Find better freelance sites, gig platforms, and marketplaces.
Open platforms where anyone can register to work or hire — freelance sites like Upwork, ride platforms like Uber, and more. Vetted networks are included and marked. Browse with filters, discover with AI, see curated lists, or submit a site.
25 platforms found · Clear filters
A pentest-as-a-service platform whose vetted Cobalt Core community of pentesters earns from structured engagements rather than open bounties…
cobalt.ioA vetted security testing platform whose Red Team accepts researchers only after skills assessment and background checks. Members get steady…
synack.comPays open source maintainers (as lifters) for keeping packages secure and well-maintained, funded by enterprise subscriptions.
tidelift.comAn open AI challenge platform hosting research competitions with prizes, often in reinforcement learning and applied ML.
aicrowd.comA crowdsourced security platform running bug bounty and vulnerability disclosure programs. Researchers earn cash for valid findings, ranked…
bugcrowd.comBounties set by each programThe largest hackathon platform - find online and in-person hackathons with cash prizes across every theme and skill level.
devpost.comData science competitions with social impact - solve problems for nonprofits and public agencies with cash prizes.
drivendata.orgSponsorship directly inside GitHub - developers and organizations fund your open source work monthly or one-time, with no platform fee on pe…
github.comA bug bounty platform from the Hacken security ecosystem, focused on web3 and crypto projects with public and private programs.
hackenproof.comThe largest bug bounty platform, where security researchers report vulnerabilities to companies and earn bounties. Open sign-up, with invita…
hackerone.comBounties set by each programA crowdsourced innovation platform where organizations post prize challenges open to anyone, from engineering to naming contests.
herox.comThe leading bug bounty platform for web3 and smart contracts, known for some of the largest payouts in security - top bounties run into the…
immunefi.comA European bug bounty platform connecting ethical hackers with companies across the continent and beyond. Known for community events and fas…
intigriti.comBounties set by each programThe home of data science competitions, owned by Google - prize pools regularly reach tens of thousands of dollars, plus community hackathons…
kaggle.comA non-profit platform for recurrent donations to creators and maintainers - no platform fee, only payment processing costs.
liberapay.comAn Indian ML competition platform with hackathons and hiring challenges from data-driven companies.
machinehack.comA non-profit, open platform for responsible disclosure of website vulnerabilities. Researchers report issues and site owners may reward them…
openbugbounty.orgTransparent funding for open source projects and communities - collect sponsorships and donations, spend with full public accounting.
opencollective.comA funding and monetization platform for developers - sell licenses, subscriptions, and digital products on top of open source, acting as mer…
polar.shThe original competitive programming and crowdsourced development platform, paying members for design, development, and data science challen…
topcoder.comIndia largest competitions and hackathons platform for students and professionals, with cash prizes and hiring challenges.
unstop.comThe challenge network formerly known as InnoCentive, paying solvers for breakthrough solutions to R&D and innovation problems.
wazoku.comA French bug bounty platform serving European enterprises and public institutions. Researchers worldwide hunt on public and private programs…
yeswehack.comBounties set by each programA Dutch security platform running bug bounty and coordinated vulnerability disclosure programs with a community of invited researchers.
zerocopter.comAfrica data science competition platform, connecting African data scientists with paid challenges from companies and NGOs.
zindi.africa