diff --git a/apps/api/requests.http b/apps/api/requests.http
index a3997371..4c69d011 100644
--- a/apps/api/requests.http
+++ b/apps/api/requests.http
@@ -19,7 +19,7 @@ Authorization: Bearer {{$dotenv TEST_API_KEY}}
 content-type: application/json
 
 {
-  "url": "https://firecrawl.dev"
+  "url":"https://firecrawl.dev"
 }
 
 ### Check Crawl Status
diff --git a/apps/api/src/__tests__/snips/scrape.test.ts b/apps/api/src/__tests__/snips/scrape.test.ts
index 2b697ca9..7495e789 100644
--- a/apps/api/src/__tests__/snips/scrape.test.ts
+++ b/apps/api/src/__tests__/snips/scrape.test.ts
@@ -84,6 +84,18 @@ describe("Scrape tests", () => {
     //     expect(response.markdown).toMatch(/(\.g\.doubleclick\.net|amazon-adsystem\.com)\//);
     //   }, 30000);
     // });
+
+    describe("Compare format", () => {
+      it.concurrent("works", async () => {
+        const response = await scrape({
+          url: "https://example.com",
+          formats: ["markdown", "compare"],
+        });
+
+        expect(response.compare).toBeDefined();
+        expect(response.compare?.previousScrapeAt).not.toBeNull();
+      });
+    });
   
     describe("Location API (f-e dependant)", () => {
       it.concurrent("works without specifying an explicit location", async () => {
diff --git a/apps/api/src/controllers/v0/crawl.ts b/apps/api/src/controllers/v0/crawl.ts
index 2eba651d..c8b186b0 100644
--- a/apps/api/src/controllers/v0/crawl.ts
+++ b/apps/api/src/controllers/v0/crawl.ts
@@ -158,6 +158,7 @@ export async function crawlController(req: Request, res: Response) {
       pageOptions,
       undefined,
       undefined,
+      team_id
     );
     internalOptions.disableSmartWaitCache = true; // NOTE: smart wait disabled for crawls to ensure contentful scrape, speed does not matter
 
diff --git a/apps/api/src/controllers/v0/crawlPreview.ts b/apps/api/src/controllers/v0/crawlPreview.ts
index ffb8ebba..9153ea79 100644
--- a/apps/api/src/controllers/v0/crawlPreview.ts
+++ b/apps/api/src/controllers/v0/crawlPreview.ts
@@ -99,6 +99,7 @@ export async function crawlPreviewController(req: Request, res: Response) {
       pageOptions,
       undefined,
       undefined,
+      team_id
     );
 
     const sc: StoredCrawl = {
diff --git a/apps/api/src/controllers/v0/scrape.ts b/apps/api/src/controllers/v0/scrape.ts
index 62d62b09..0bdd197b 100644
--- a/apps/api/src/controllers/v0/scrape.ts
+++ b/apps/api/src/controllers/v0/scrape.ts
@@ -66,6 +66,7 @@ export async function scrapeHelper(
     extractorOptions,
     timeout,
     crawlerOptions,
+    team_id,
   );
 
   await addScrapeJob(
@@ -297,6 +298,7 @@ export async function scrapeController(req: Request, res: Response) {
       pageOptions,
       extractorOptions,
       timeout,
+      team_id,
     );
 
     logJob({
diff --git a/apps/api/src/controllers/v0/search.ts b/apps/api/src/controllers/v0/search.ts
index ac7d7f62..d8649a52 100644
--- a/apps/api/src/controllers/v0/search.ts
+++ b/apps/api/src/controllers/v0/search.ts
@@ -72,6 +72,7 @@ export async function searchHelper(
     undefined,
     60000,
     crawlerOptions,
+    team_id,
   );
 
   if (justSearch) {
diff --git a/apps/api/src/controllers/v1/batch-scrape.ts b/apps/api/src/controllers/v1/batch-scrape.ts
index d2c079bf..20fab47c 100644
--- a/apps/api/src/controllers/v1/batch-scrape.ts
+++ b/apps/api/src/controllers/v1/batch-scrape.ts
@@ -82,7 +82,7 @@ export async function batchScrapeController(
     : {
         crawlerOptions: null,
         scrapeOptions: req.body,
-        internalOptions: { disableSmartWaitCache: true }, // NOTE: smart wait disabled for batch scrapes to ensure contentful scrape, speed does not matter
+        internalOptions: { disableSmartWaitCache: true, teamId: req.auth.team_id }, // NOTE: smart wait disabled for batch scrapes to ensure contentful scrape, speed does not matter
         team_id: req.auth.team_id,
         createdAt: Date.now(),
         plan: req.auth.plan,
diff --git a/apps/api/src/controllers/v1/crawl.ts b/apps/api/src/controllers/v1/crawl.ts
index 51d373ee..31e39502 100644
--- a/apps/api/src/controllers/v1/crawl.ts
+++ b/apps/api/src/controllers/v1/crawl.ts
@@ -81,7 +81,7 @@ export async function crawlController(
     originUrl: req.body.url,
     crawlerOptions: toLegacyCrawlerOptions(crawlerOptions),
     scrapeOptions,
-    internalOptions: { disableSmartWaitCache: true }, // NOTE: smart wait disabled for crawls to ensure contentful scrape, speed does not matter
+    internalOptions: { disableSmartWaitCache: true, teamId: req.auth.team_id }, // NOTE: smart wait disabled for crawls to ensure contentful scrape, speed does not matter
     team_id: req.auth.team_id,
     createdAt: Date.now(),
     plan: req.auth.plan,
diff --git a/apps/api/src/controllers/v1/map.ts b/apps/api/src/controllers/v1/map.ts
index ebb0b324..49890d90 100644
--- a/apps/api/src/controllers/v1/map.ts
+++ b/apps/api/src/controllers/v1/map.ts
@@ -85,7 +85,7 @@ export async function getMapResults({
       scrapeOptions: undefined,
     },
     scrapeOptions: scrapeOptions.parse({}),
-    internalOptions: {},
+    internalOptions: { teamId },
     team_id: teamId,
     createdAt: Date.now(),
     plan: plan,
diff --git a/apps/api/src/controllers/v1/scrape.ts b/apps/api/src/controllers/v1/scrape.ts
index ec11e2cb..44214ee2 100644
--- a/apps/api/src/controllers/v1/scrape.ts
+++ b/apps/api/src/controllers/v1/scrape.ts
@@ -50,7 +50,7 @@ export async function scrapeController(
       mode: "single_urls",
       team_id: req.auth.team_id,
       scrapeOptions: req.body,
-      internalOptions: {},
+      internalOptions: { teamId: req.auth.team_id },
       plan: req.auth.plan!,
       origin: req.body.origin,
       is_scrape: true,
diff --git a/apps/api/src/controllers/v1/search.ts b/apps/api/src/controllers/v1/search.ts
index 18ff9579..082cd8cd 100644
--- a/apps/api/src/controllers/v1/search.ts
+++ b/apps/api/src/controllers/v1/search.ts
@@ -83,7 +83,7 @@ async function scrapeSearchResult(
         mode: "single_urls" as Mode,
         team_id: options.teamId,
         scrapeOptions: options.scrapeOptions,
-        internalOptions: {},
+        internalOptions: { teamId: options.teamId },
         plan: options.plan || "free",
         origin: options.origin,
         is_scrape: true,
diff --git a/apps/api/src/controllers/v1/types.ts b/apps/api/src/controllers/v1/types.ts
index 459e5e56..b610826d 100644
--- a/apps/api/src/controllers/v1/types.ts
+++ b/apps/api/src/controllers/v1/types.ts
@@ -20,7 +20,8 @@ export type Format =
   | "links"
   | "screenshot"
   | "screenshot@fullPage"
-  | "extract";
+  | "extract"
+  | "compare";
 
 export const url = z.preprocess(
   (x) => {
@@ -165,6 +166,7 @@ const baseScrapeOptions = z
         "screenshot@fullPage",
         "extract",
         "json",
+        "compare",
       ])
       .array()
       .optional()
@@ -172,6 +174,10 @@ const baseScrapeOptions = z
       .refine(
         (x) => !(x.includes("screenshot") && x.includes("screenshot@fullPage")),
         "You may only specify either screenshot or screenshot@fullPage",
+      )
+      .refine(
+        (x) => !x.includes("compare") || x.includes("markdown"),
+        "The compare format requires the markdown format to be specified as well",
       ),
     headers: z.record(z.string(), z.string()).optional(),
     includeTags: z.string().array().optional(),
@@ -546,6 +552,11 @@ export type Document = {
       value: unknown
     }[];
   };
+  compare?: {
+    previousScrapeAt: string | null;
+    changeStatus: "new" | "same" | "changed" | "removed";
+    visibility: "visible" | "hidden";
+  }
   metadata: {
     title?: string;
     description?: string;
@@ -812,7 +823,7 @@ export function toLegacyCrawlerOptions(x: CrawlerOptions) {
   };
 }
 
-export function fromLegacyCrawlerOptions(x: any): {
+export function fromLegacyCrawlerOptions(x: any, teamId: string): {
   crawlOptions: CrawlerOptions;
   internalOptions: InternalOptions;
 } {
@@ -834,6 +845,7 @@ export function fromLegacyCrawlerOptions(x: any): {
    }),
     internalOptions: {
       v0CrawlOnlyUrls: x.returnOnlyUrls,
+      teamId,
     },
   };
 }
@@ -847,6 +859,7 @@ export function fromLegacyScrapeOptions(
   pageOptions: PageOptions,
   extractorOptions: ExtractorOptions | undefined,
   timeout: number | undefined,
+  teamId: string,
 ): { scrapeOptions: ScrapeOptions; internalOptions: InternalOptions } {
   return {
     scrapeOptions: scrapeOptions.parse({
@@ -896,6 +909,7 @@ export function fromLegacyScrapeOptions(
     internalOptions: {
       atsv: pageOptions.atsv,
       v0DisableJsDom: pageOptions.disableJsDom,
+      teamId,
     },
     // TODO: fallback, fetchPageContent, replaceAllPathsWithAbsolutePaths, includeLinks
   };
@@ -906,13 +920,15 @@ export function fromLegacyCombo(
   extractorOptions: ExtractorOptions | undefined,
   timeout: number | undefined,
   crawlerOptions: any,
+  teamId: string,
 ): { scrapeOptions: ScrapeOptions; internalOptions: InternalOptions } {
   const { scrapeOptions, internalOptions: i1 } = fromLegacyScrapeOptions(
     pageOptions,
     extractorOptions,
     timeout,
+    teamId,
   );
-  const { internalOptions: i2 } = fromLegacyCrawlerOptions(crawlerOptions);
+  const { internalOptions: i2 } = fromLegacyCrawlerOptions(crawlerOptions, teamId);
   return { scrapeOptions, internalOptions: Object.assign(i1, i2) };
 }
 
diff --git a/apps/api/src/lib/crawl-redis.ts b/apps/api/src/lib/crawl-redis.ts
index b741e615..e261800f 100644
--- a/apps/api/src/lib/crawl-redis.ts
+++ b/apps/api/src/lib/crawl-redis.ts
@@ -154,20 +154,20 @@ export async function finishCrawlKickoff(id: string) {
   );
 }
 
-export async function finishCrawl(id: string) {
+export async function finishCrawlPre(id: string) {
   if (await isCrawlFinished(id)) {
-    _logger.debug("Marking crawl as finished.", {
+    _logger.debug("Marking crawl as pre-finished.", {
       module: "crawl-redis",
-      method: "finishCrawl",
+      method: "finishCrawlPre",
       crawlId: id,
     });
-    const set = await redisConnection.setnx("crawl:" + id + ":finish", "yes");
-    await redisConnection.expire("crawl:" + id + ":finish", 24 * 60 * 60);
+    const set = await redisConnection.setnx("crawl:" + id + ":finished_pre", "yes");
+    await redisConnection.expire("crawl:" + id + ":finished_pre", 24 * 60 * 60);
     return set === 1;
   } else {
-    _logger.debug("Crawl can not be finished yet, not marking as finished.", {
+    _logger.debug("Crawl can not be pre-finished yet, not marking as finished.", {
       module: "crawl-redis",
-      method: "finishCrawl",
+      method: "finishCrawlPre",
       crawlId: id,
       jobs_done: await redisConnection.scard("crawl:" + id + ":jobs_done"),
       jobs: await redisConnection.scard("crawl:" + id + ":jobs"),
@@ -177,6 +177,16 @@ export async function finishCrawl(id: string) {
   }
 }
 
+export async function finishCrawl(id: string) {
+  _logger.debug("Marking crawl as finished.", {
+    module: "crawl-redis",
+    method: "finishCrawl",
+    crawlId: id,
+  });
+  await redisConnection.set("crawl:" + id + ":finish", "yes");
+  await redisConnection.expire("crawl:" + id + ":finish", 24 * 60 * 60);
+}
+
 export async function getCrawlJobs(id: string): Promise<string[]> {
   return await redisConnection.smembers("crawl:" + id + ":jobs");
 }
@@ -250,7 +260,7 @@ export function generateURLPermutations(url: string | URL): URL[] {
     return [urlWithHTML, urlWithPHP, urlWithSlash, urlWithBare];
   });
 
-  return permutations;
+  return [...new Set(permutations.map(x => x.href))].map(x => new URL(x));
 }
 
 export async function lockURL(
diff --git a/apps/api/src/lib/extract/document-scraper.ts b/apps/api/src/lib/extract/document-scraper.ts
index 8cbc75fd..e9bd729a 100644
--- a/apps/api/src/lib/extract/document-scraper.ts
+++ b/apps/api/src/lib/extract/document-scraper.ts
@@ -44,6 +44,7 @@ export async function scrapeDocument(
         scrapeOptions: scrapeOptions.parse({ ...internalScrapeOptions }),
         internalOptions: {
           useCache: true,
+          teamId: options.teamId,
         },
         plan: options.plan,
         origin: options.origin,
diff --git a/apps/api/src/main/runWebScraper.ts b/apps/api/src/main/runWebScraper.ts
index c6751218..ba983e07 100644
--- a/apps/api/src/main/runWebScraper.ts
+++ b/apps/api/src/main/runWebScraper.ts
@@ -51,6 +51,7 @@ export async function startWebScraperPipeline({
     priority: job.opts.priority,
     is_scrape: job.data.is_scrape ?? false,
     is_crawl: !!(job.data.crawl_id && job.data.crawlerOptions !== null),
+    urlInvisibleInCurrentCrawl: job.data.crawlerOptions?.urlInvisibleInCurrentCrawl ?? false,
   });
 }
 
@@ -66,6 +67,7 @@ export async function runWebScraper({
   priority,
   is_scrape = false,
   is_crawl = false,
+  urlInvisibleInCurrentCrawl = false,
 }: RunWebScraperParams): Promise<ScrapeUrlResponse> {
   const logger = _logger.child({
     method: "runWebScraper",
@@ -97,6 +99,8 @@ export async function runWebScraper({
       response = await scrapeURL(bull_job_id, url, scrapeOptions, {
         priority,
         ...internalOptions,
+        urlInvisibleInCurrentCrawl,
+        teamId: internalOptions?.teamId ?? team_id,
       });
       if (!response.success) {
         if (response.error instanceof Error) {
diff --git a/apps/api/src/scraper/WebScraper/sitemap.ts b/apps/api/src/scraper/WebScraper/sitemap.ts
index c2c60383..f945cd22 100644
--- a/apps/api/src/scraper/WebScraper/sitemap.ts
+++ b/apps/api/src/scraper/WebScraper/sitemap.ts
@@ -47,6 +47,7 @@ export async function getLinksFromSitemap(
           ],
           v0DisableJsDom: true,
           abort,
+          teamId: "sitemap",
         },
       );
 
diff --git a/apps/api/src/scraper/scrapeURL/index.ts b/apps/api/src/scraper/scrapeURL/index.ts
index eaf5497a..e047d1cb 100644
--- a/apps/api/src/scraper/scrapeURL/index.ts
+++ b/apps/api/src/scraper/scrapeURL/index.ts
@@ -162,6 +162,8 @@ async function buildMetaObject(
 }
 
 export type InternalOptions = {
+  teamId: string;
+  
   priority?: number; // Passed along to fire-engine
   forceEngine?: Engine | Engine[];
   atsv?: boolean; // anti-bot solver, beta
@@ -173,6 +175,7 @@ export type InternalOptions = {
   isBackgroundIndex?: boolean;
   fromCache?: boolean; // Indicates if the document was retrieved from cache
   abort?: AbortSignal;
+  urlInvisibleInCurrentCrawl?: boolean;
 };
 
 export type EngineResultsTracker = {
@@ -383,7 +386,7 @@ export async function scrapeURL(
   id: string,
   url: string,
   options: ScrapeOptions,
-  internalOptions: InternalOptions = {},
+  internalOptions: InternalOptions,
 ): Promise<ScrapeUrlResponse> {
   const meta = await buildMetaObject(id, url, options, internalOptions);
   try {
diff --git a/apps/api/src/scraper/scrapeURL/scrapeURL.test.ts b/apps/api/src/scraper/scrapeURL/scrapeURL.test.ts
index 8b783821..b545266f 100644
--- a/apps/api/src/scraper/scrapeURL/scrapeURL.test.ts
+++ b/apps/api/src/scraper/scrapeURL/scrapeURL.test.ts
@@ -31,7 +31,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-basic",
         "https://www.roastmywebsite.ai/",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -78,7 +78,7 @@ describe("Standalone scrapeURL tests", () => {
         scrapeOptions.parse({
           formats: ["markdown", "html"],
         }),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -102,7 +102,7 @@ describe("Standalone scrapeURL tests", () => {
         scrapeOptions.parse({
           onlyMainContent: false,
         }),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -125,7 +125,7 @@ describe("Standalone scrapeURL tests", () => {
           onlyMainContent: false,
           excludeTags: [".nav", "#footer", "strong"],
         }),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -145,7 +145,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-400",
         "https://httpstat.us/400",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -163,7 +163,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-401",
         "https://httpstat.us/401",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -181,7 +181,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-403",
         "https://httpstat.us/403",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -199,7 +199,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-404",
         "https://httpstat.us/404",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -217,7 +217,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-405",
         "https://httpstat.us/405",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -235,7 +235,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-500",
         "https://httpstat.us/500",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -253,7 +253,7 @@ describe("Standalone scrapeURL tests", () => {
         "test:scrape-redirect",
         "https://scrapethissite.com/",
         scrapeOptions.parse({}),
-        { forceEngine },
+        { forceEngine, teamId: "test" },
       );
 
       // expect(out.logs.length).toBeGreaterThan(0);
@@ -285,7 +285,7 @@ describe("Standalone scrapeURL tests", () => {
           scrapeOptions.parse({
             formats: ["screenshot"],
           }),
-          { forceEngine },
+          { forceEngine, teamId: "test" },
         );
 
         // expect(out.logs.length).toBeGreaterThan(0);
@@ -313,7 +313,7 @@ describe("Standalone scrapeURL tests", () => {
           scrapeOptions.parse({
             formats: ["screenshot@fullPage"],
           }),
-          { forceEngine },
+          { forceEngine, teamId: "test" },
         );
 
         // expect(out.logs.length).toBeGreaterThan(0);
@@ -341,6 +341,7 @@ describe("Standalone scrapeURL tests", () => {
       "test:scrape-pdf",
       "https://arxiv.org/pdf/astro-ph/9301001.pdf",
       scrapeOptions.parse({}),
+      { teamId: "test" },
     );
 
     // expect(out.logs.length).toBeGreaterThan(0);
@@ -359,6 +360,7 @@ describe("Standalone scrapeURL tests", () => {
       "test:scrape-docx",
       "https://nvca.org/wp-content/uploads/2019/06/NVCA-Model-Document-Stock-Purchase-Agreement.docx",
       scrapeOptions.parse({}),
+      { teamId: "test" },
     );
 
     // expect(out.logs.length).toBeGreaterThan(0);
@@ -395,6 +397,7 @@ describe("Standalone scrapeURL tests", () => {
           },
         },
       }),
+      { teamId: "test" },
     );
 
     // expect(out.logs.length).toBeGreaterThan(0);
@@ -430,6 +433,7 @@ describe("Standalone scrapeURL tests", () => {
           },
         },
       }),
+      { teamId: "test" },
     );
 
     // expect(out.logs.length).toBeGreaterThan(0);
@@ -451,7 +455,7 @@ describe("Standalone scrapeURL tests", () => {
     async (i) => {
       const url = "https://www.scrapethissite.com/?i=" + i;
       const id = "test:concurrent:" + url;
-      const out = await scrapeURL(id, url, scrapeOptions.parse({}));
+      const out = await scrapeURL(id, url, scrapeOptions.parse({}), { teamId: "test" });
 
       const replacer = (key: string, value: any) => {
         if (value instanceof Error) {
diff --git a/apps/api/src/scraper/scrapeURL/transformers/diff.ts b/apps/api/src/scraper/scrapeURL/transformers/diff.ts
new file mode 100644
index 00000000..9628844d
--- /dev/null
+++ b/apps/api/src/scraper/scrapeURL/transformers/diff.ts
@@ -0,0 +1,42 @@
+import { supabase_service } from "../../../services/supabase";
+import { Document } from "../../../controllers/v1/types";
+import { Meta } from "../index";
+
+export async function deriveDiff(meta: Meta, document: Document): Promise<Document> {
+  if (meta.options.formats.includes("compare")) {
+    const res = await supabase_service
+        .rpc("diff_get_last_scrape_1", {
+            i_team_id: meta.internalOptions.teamId,
+            i_url: document.metadata.sourceURL ?? meta.url,
+        });
+
+    const data: {
+        o_docs: Document[],
+        o_date_added: string,
+    } | undefined | null = (res.data ?? [])[0] as any;
+
+    if (data && data.o_docs.length > 0) {
+        const previousMarkdown = data.o_docs[0].markdown!;
+        const currentMarkdown = document.markdown!;
+
+        const transformer = (x: string) => [...x.replace(/\s+/g, "").replace(/\[iframe\]\(.+?\)/g, "")].sort().join("");
+
+        document.compare = {
+            previousScrapeAt: data.o_date_added,
+            changeStatus: document.metadata.statusCode === 404 ? "removed" : transformer(previousMarkdown) === transformer(currentMarkdown) ? "same" : "changed",
+            visibility: meta.internalOptions.urlInvisibleInCurrentCrawl ? "hidden" : "visible",
+        }
+    } else if (!res.error) {
+        document.compare = {
+            previousScrapeAt: null,
+            changeStatus: document.metadata.statusCode === 404 ? "removed" : "new",
+            visibility: meta.internalOptions.urlInvisibleInCurrentCrawl ? "hidden" : "visible",
+        }
+    } else {
+        meta.logger.error("Error fetching previous scrape", { error: res.error });
+        document.warning = "Comparing failed, please try again later." + (document.warning ? ` ${document.warning}` : "");
+    }
+  }
+  
+  return document;
+}
diff --git a/apps/api/src/scraper/scrapeURL/transformers/index.ts b/apps/api/src/scraper/scrapeURL/transformers/index.ts
index ea149dba..114c59a8 100644
--- a/apps/api/src/scraper/scrapeURL/transformers/index.ts
+++ b/apps/api/src/scraper/scrapeURL/transformers/index.ts
@@ -8,7 +8,7 @@ import { performLLMExtract } from "./llmExtract";
 import { uploadScreenshot } from "./uploadScreenshot";
 import { removeBase64Images } from "./removeBase64Images";
 import { saveToCache } from "./cache";
-
+import { deriveDiff } from "./diff";
 export type Transformer = (
   meta: Meta,
   document: Document,
@@ -148,6 +148,17 @@ export function coerceFieldsToFormats(
     );
   }
 
+  if (!formats.has("compare") && document.compare !== undefined) {
+    meta.logger.warn(
+      "Removed compare from Document because it wasn't in formats -- this is extremely wasteful and indicates a bug.",
+    );
+    delete document.compare;
+  } else if (formats.has("compare") && document.compare === undefined) {
+    meta.logger.warn(
+      "Request had format compare, but there was no compare field in the result.",
+    );
+  }
+
   if (meta.options.actions === undefined || meta.options.actions.length === 0) {
     delete document.actions;
   }
@@ -164,6 +175,7 @@ export const transformerStack: Transformer[] = [
   deriveMetadataFromRawHTML,
   uploadScreenshot,
   performLLMExtract,
+  deriveDiff,
   coerceFieldsToFormats,
   removeBase64Images,
 ];
diff --git a/apps/api/src/services/queue-worker.ts b/apps/api/src/services/queue-worker.ts
index b6cfc454..a7da10f7 100644
--- a/apps/api/src/services/queue-worker.ts
+++ b/apps/api/src/services/queue-worker.ts
@@ -28,6 +28,7 @@ import {
   addCrawlJobs,
   crawlToCrawler,
   finishCrawl,
+  finishCrawlPre,
   finishCrawlKickoff,
   generateURLPermutations,
   getCrawl,
@@ -100,7 +101,77 @@ const gotJobInterval = Number(process.env.CONNECTION_MONITOR_INTERVAL) || 20;
 const runningJobs: Set<string> = new Set();
 
 async function finishCrawlIfNeeded(job: Job & { id: string }, sc: StoredCrawl) {
-  if (await finishCrawl(job.data.crawl_id)) {
+  if (await finishCrawlPre(job.data.crawl_id)) {
+    if (job.data.crawlerOptions && !await redisConnection.exists("crawl:" + job.data.crawl_id + ":invisible_urls")) {
+      await redisConnection.set("crawl:" + job.data.crawl_id + ":invisible_urls", "done", "EX", 60 * 60 * 24);
+
+      const sc = (await getCrawl(job.data.crawl_id))!;
+
+      const visitedUrls = new Set(await redisConnection.smembers(
+        "crawl:" + job.data.crawl_id + ":visited_unique",
+      ));
+
+      const lastUrls: string[] = ((await supabase_service.rpc("diff_get_last_crawl_urls", {
+        i_team_id: job.data.team_id,
+        i_url: sc.originUrl!,
+      })).data ?? []).map(x => x.url);
+
+      const lastUrlsSet = new Set(lastUrls);
+
+      const univistedUrls = Array.from(lastUrlsSet).filter(x => !visitedUrls.has(x));
+      const addableJobCount = sc.crawlerOptions.limit === undefined ? Infinity : (sc.crawlerOptions.limit - await getDoneJobsOrderedLength(job.data.crawl_id));
+
+      console.log(sc.originUrl!, univistedUrls, visitedUrls, lastUrls, addableJobCount);
+
+      if (univistedUrls.length !== 0 && addableJobCount > 0) {
+        const jobs = univistedUrls.slice(0, addableJobCount).map((url) => {
+          const uuid = uuidv4();
+          return {
+            name: uuid,
+            data: {
+              url,
+              mode: "single_urls" as const,
+              team_id: job.data.team_id,
+              plan: job.data.plan!,
+              crawlerOptions: {
+                ...job.data.crawlerOptions,
+                urlInvisibleInCurrentCrawl: true,
+              },
+              scrapeOptions: job.data.scrapeOptions,
+              internalOptions: sc.internalOptions,
+              origin: job.data.origin,
+              crawl_id: job.data.crawl_id,
+              sitemapped: true,
+              webhook: job.data.webhook,
+              v1: job.data.v1,
+            },
+            opts: {
+              jobId: uuid,
+              priority: 20,
+            },
+          };
+        });
+
+        const lockedIds = await lockURLsIndividually(
+          job.data.crawl_id,
+          sc,
+          jobs.map((x) => ({ id: x.opts.jobId, url: x.data.url })),
+        );
+        const lockedJobs = jobs.filter((x) =>
+          lockedIds.find((y) => y.id === x.opts.jobId),
+        );
+        await addCrawlJobs(
+          job.data.crawl_id,
+          lockedJobs.map((x) => x.opts.jobId),
+        );
+        await addScrapeJobs(lockedJobs);
+
+        return;
+      }
+    }
+
+    await finishCrawl(job.data.crawl_id);
+
     (async () => {
       const originUrl = sc.originUrl
         ? normalizeUrlOnlyHostname(sc.originUrl)
diff --git a/apps/api/src/types.ts b/apps/api/src/types.ts
index f051b183..adc7df37 100644
--- a/apps/api/src/types.ts
+++ b/apps/api/src/types.ts
@@ -59,6 +59,7 @@ export interface RunWebScraperParams {
   priority?: number;
   is_scrape?: boolean;
   is_crawl?: boolean;
+  urlInvisibleInCurrentCrawl?: boolean;
 }
 
 export type RunWebScraperResult =
diff --git a/apps/js-sdk/firecrawl/package.json b/apps/js-sdk/firecrawl/package.json
index 0e6dbf7c..772f2a3e 100644
--- a/apps/js-sdk/firecrawl/package.json
+++ b/apps/js-sdk/firecrawl/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mendable/firecrawl-js",
-  "version": "1.21.0",
+  "version": "1.21.1",
   "description": "JavaScript SDK for Firecrawl API",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/apps/js-sdk/firecrawl/src/index.ts b/apps/js-sdk/firecrawl/src/index.ts
index 41d13da0..bec5288f 100644
--- a/apps/js-sdk/firecrawl/src/index.ts
+++ b/apps/js-sdk/firecrawl/src/index.ts
@@ -69,6 +69,11 @@ export interface FirecrawlDocument<T = any, ActionsSchema extends (ActionsResult
   screenshot?: string;
   metadata?: FirecrawlDocumentMetadata;
   actions: ActionsSchema;
+  compare?: {
+    previousScrapeAt: string | null;
+    changeStatus: "new" | "same" | "changed" | "removed";
+    visibility: "visible" | "hidden";
+  };
   // v1 search only
   title?: string;
   description?: string;
@@ -79,7 +84,7 @@ export interface FirecrawlDocument<T = any, ActionsSchema extends (ActionsResult
  * Defines the options and configurations available for scraping web content.
  */
 export interface CrawlScrapeOptions {
-  formats?: ("markdown" | "html" | "rawHtml" | "content" | "links" | "screenshot" | "screenshot@fullPage" | "extract" | "json")[];
+  formats?: ("markdown" | "html" | "rawHtml" | "content" | "links" | "screenshot" | "screenshot@fullPage" | "extract" | "json" | "compare")[];
   headers?: Record<string, string>;
   includeTags?: string[];
   excludeTags?: string[];