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Developer tools

Roundtable

Roundtable Proof of Human is an API that invisibly detects bots and verifies human identity. Founded by 2 Princeton cognitive scientists, Roundtable leverages world-class research with enterprise-grade accuracy and latency so websites can verify their human users friction-free.

sources
1
Evidence entries preserved.
affiliations
1
Y Combinator
competitors
6
Mapped from High Signal graph features.
status
generated
D1 lookup
last updated
2026-07-15
16:41 UTC
source evidence
Why this company exists here

Y Combinator

yc-company-directory #2511

Roundtable Proof of Human is an API that invisibly detects bots and verifies human identity. Founded by 2 Princeton cognitive scientists, Roundtable leverages world-class research with enterprise-grade accuracy and latency so websites can verify their human users friction-free.

source
generated read
High Signal interpretation

Roundtable is classified as Developer tools from source descriptions and fund-directory context. Similar companies below are ranked from offline product facets and meaningful description overlap; category and source affiliation can only strengthen an existing product match. For lookup-created rows, the profile starts as pending enrichment until deeper source collection runs.

offline extraction
Product facets
APIRoundtable Proof of HumanwebsitesRoundtable Proof of Humanbots
mapping method
Similarity graph

Local clusters rerank extracted product concepts and description terms. The generated graph remains the fallback for sparse descriptions: offline reciprocal product-similarity graph: extracted concepts + description terms + bounded category/affiliation boosts. Minimum fallback score: 0; max competitors: 6.

discovery cluster

Companies similar to Roundtable

Developer tools · 6 peers

A deterministic local cluster built from offline product facets and meaningful description terms. Category and selected-institution affiliation provide bounded tie-breaks. Open any peer to continue exploring its cluster.

Algolia

match 51

Our mission is to make every search interaction meaningful & rewarding, through developer-friendly and enterprise-grade APIs. Algolia is the leading Search & Discovery API for websites and mobile apps. We help the most innovative companies across e-commerce, media and SaaS industries create powerful, relevant and scalable discovery experiences for their users. Unlike other solutions, our hosted platform reduces the complexities of building and scaling a fast, relevant digital experience and help

shared extracted concept terms: api; shared product terms: api, enterprise, grade, website; shared product theme: developer infrastructure; same category: Developer tools; shared affiliation: Y Combinator

PAX Markets

match 45

PAX is a new crypto CEX that delivers more 𝛼 with its in-silicon exchange and HFT technology. The PAX exchange integrated on-chip λ API provides deterministic nanosecond tick-to-trade latency. HFT λ traders experience non-adverse counterparty selection by pairing with free-tier traders who access PAX using our zero-cost & always rebated legacy API. Using our patented technology, PAX is building a new generation of exchange co-lo facilities that unite HFT with exchange and monetizing by vertical

shared extracted concepts: api; shared product terms: api, latency, free; shared product theme: developer infrastructure; same category: Developer tools; shared affiliation: Y Combinator

Reality Defender

match 43

Reality Defender is the market leader in deepfake detection, protecting enterprises and governments from realtime deepfake and agentic fraud. Sign up for free access at https://www.realitydefender.com/api Website: www.realitydefender.com Contact: ask@realitydefender.com YC AMA: https://news.ycombinator.com/item?id=30766050 Awards: 2025 - Gartner: Recognized as Market Leader in Deepfake Detection 2025 - JPMorgan: Inducted into Hall of Innovation 2025 - World Economic Forum: Named Technology Pione

shared product terms: enterprise, free, api, website; shared product theme: developer infrastructure, security and compliance; shared affiliation: Y Combinator

Downlink

match 42

Downlink is a platform that continuously improves your AI. Boost rate limits, slash latency, and raise accuracy.All through one simple API.

shared extracted concepts: api; shared product terms: latency, accuracy, api; shared product theme: developer infrastructure; shared affiliation: Y Combinator

AgentMail

match 42

AgentMail is the email inbox API for AI agents. It gives agents their own email inboxes, like Gmail does for humans.

shared extracted concept terms: api, human; shared product terms: api, human; shared product theme: developer infrastructure; shared affiliation: Y Combinator

TakeShape

match 34

A stress-free Headless CMS, GraphQL API, and Static Site Generator to help you get your projects done.

shared extracted concept terms: api; shared product terms: free, api; shared product theme: developer infrastructure; same category: Developer tools