Company lists · Data refreshed September 2026
Top 25 Crowdsourcing platform developers worldwide
RevenueBase identified 1,569 crowdsourcing platform developers worldwide as of September 2026 and tracks 170,529 professional contacts across them, including 6,303 with verified work emails. The United States is the largest market and London the largest hub.
This list covers crowdsourcing platform developers worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for crowdsourcing platform developers follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest crowdsourcing platform developers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 127,560 contacts → | ||||
Indirect evidence “Upwork is the world’s work marketplace that connects businesses with independent talent from across the globe.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 5,001 contacts → | ||||
Indirect evidence “With over $5 billion in global payments,$200 million in annual revenue, 70k contracts signed, Toptal is the world’s largest fully remote workforce.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,498 contacts → | ||||
Partial evidence “Warburg Pincus–backed, Arise is a borderless, purpose-built technology platform delivering human intelligence on demand enabling enterprises to scale smarter, faster through a…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,477 contacts → | ||||
Partial evidence “With +10 years in the market, Workana is the largest remote work platform for hiring top talent in Latin America.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,435 contacts → | ||||
Indirect evidence “PeoplePerHour is the UK’s leading freelance marketplace.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,330 contacts → | ||||
Partial evidence “Malt is a platform that connects businesses with freelancers, finding the perfect match for every project.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,126 contacts → | ||||
Partial evidence “Guru offers a secure, flexible, and cost-effective platform for Employers and Freelancers around the globe to connect, collaborate and get work done.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 996 contacts → | ||||
Partial evidence “MBO Partners is a global talent solutions platform designed to optimize the engagement between enterprise clients and high value independent workers.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 799 contacts → | ||||
Partial evidence “With more than participants worldwide, clickworker is one of the leading providers of crowdsourcing solutions and data services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 643 contacts → | ||||
Indirect evidence “Truelancer is a Global Freelance Marketplace, Network of Freelance Professionals.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 570 contacts → | ||||
Partial evidence “Founded in 2015 by a group of engineers and entrepreneurs from Silicon Valley and New York, Fastwork is one of the largest professional freelancing platforms in Southeast Asia by…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 521 contacts → | ||||
Indirect evidence “Microworkers is a service of Weblabcenter, Inc.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 477 contacts → | ||||
Partial evidence “ComeUp is a freelance marketplace platform that empowers people to deliver their best work.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 459 contacts → | ||||
Indirect evidence “DesignCrowd is a global online marketplace for logo design, graphic design and web design.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 374 contacts → | ||||
Indirect evidence “Fiverr Pro is an all-in-one premium business solution tailored to your business needs, enabling you to recruit, onboard, manage, and pay talent without worry or hassle, so you can…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 313 contacts → | ||||
Indirect evidence “Airtasker is one of Australia’s most impactful tech companies.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 290 contacts → | ||||
Indirect evidence “We are India’s largest and most trusted distributed network of Gig workers community.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 287 contacts → | ||||
Indirect evidence “Kickstarter is on a mission to bring creative projects to life.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 285 contacts → | ||||
Indirect evidence “LittleBig Connection is an international tech scale-up founded in 2013.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 272 contacts → | ||||
Indirect evidence “Of course!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 243 contacts → | ||||
Indirect evidence “Free-lance.ru – сайт по поиску удаленной работы и исполнителей на проект.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 237 contacts → | ||||
Partial evidence “Ponisha is MENA's leading outsourcing platform.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 236 contacts → | ||||
Indirect evidence “Applicantz delivers the engineering behind the world's defining technological shifts, from Fortune 500 enterprises to the companies shaping the next generation of AI.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 235 contacts → | ||||
Indirect evidence “Remotasks es un sitio de micro empleos donde puede ganar dinero haciendo tareas simples como transcribir archivos de audio, etiquetar imágenes, moderar contenidos, etc.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 230 contacts → | ||||
Strong evidence “Reflik is a crowdsourcing platform that finds top candidates in half the time through an extensive community of independent recruiters and staffing agencies.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: crowdsourcing platform developers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names crowdsourcing platform developers.
- Partial evidence
- Its own public description names part of crowdsourcing platform developers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name crowdsourcing platform developers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,569 crowdsourcing platform developers worldwide
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Crowdsourcing platform developers worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among crowdsourcing platform developers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for crowdsourcing platform developers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “crowdsourcing platform developers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names crowdsourcing platform developers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among crowdsourcing platform developers, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 6,303 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Crowdsourcing platform developers by location
5 lists · largest firstEvery Crowdsourcing platform developers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Crowdsourcing platform developers based in the United States260
- Crowdsourcing platform developers based in India202
- Crowdsourcing platform developers based in the United Kingdom65
- Crowdsourcing platform developers based in Brazil26
Cities
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names crowdsourcing platform developers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many crowdsourcing platform developers are there worldwide?
RevenueBase identified 1,569 crowdsourcing platform developers worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Upwork, headquartered in San Francisco, tops this list with the largest team on record.
Which country has the most crowdsourcing platform developers?
The United States leads with 260 companies, followed by India (202) and the United Kingdom (65). Every crowdsourcing platform developers list by country and city is linked on this page.
Which city has the most crowdsourcing platform developers?
London leads with 40 headquartered companies, followed by New York (28) and Mumbai (18).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 6,303 verified decision-maker contacts tracked across these 1,569 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.