YC Summer 2021 Engineering, Product and Design Startups

28 Y Combinator Engineering, Product and Design companies from the Summer 2021 batch — with team size, status, and one-liner for every startup.

Total
28
Active
22
Acquired
1
Shut down
5

Y Combinator's Summer 2021 batch included 28 Engineering, Product and Design startups. Of these, 22 remain active, 1 have been acquired, and 5 have shut down.

  • Bytebot (3 people) — Bytebot is the open source container for AI desktop agents.
  • Openlayer (19 people) — The fastest way to ship airtight AI
  • hotglue (13 people) — Native user-facing SaaS integrations for your customers
  • Customily (30 people) — Making it easy to sell personalized products online.
  • Archbee (12 people) — TURN STATIC DOCS INTO INSTANT ANSWERS
  • Replo (20 people) — Sell anything
  • Affogato AI (15 people) — Affogato AI — Your Agent for instant TikToks, Reels, and ads.
  • MobileBoost (15 people) — AI native mobile testing.
  • Buzzle (3 people) — Automatic voice-of-customer trends & metrics from sales conversations.
  • Verihubs (63 people) — AI-powered Deepfake Detection
  • Pluggy (31 people) — Plaid for Brazil: we allow developers to access users' financial data
  • Mergent (1 people) — Incredibly reliable background task queues and cron jobs
  • Vibe Kanban (10 people) — Plan and review AI generated code
  • Echoes HQ (3 people) — Measure and communicate engineering activity
  • Squire.ai (8 people) — Never code alone.
  • Superwall (15 people) — Remotely configure every aspect of your mobile app's paywall
  • testRigor (25 people) — Executable specifications in English for test automation
  • WarpBuild (5 people) — Accelerate software development with WarpBuild's 10x faster CI infra.
  • Endla (8 people) — Software that increases the value of oil & gas wells
  • Meticulous (15 people) — Automated e2e screenshot testing without writing or maintaining tests
  • Noloco (15 people) — Flexible Business Apps for Modern Teams
  • Dime (2 people) — Instant E2E tests for your website
  • Moving Parts (2 people) — Delightful components for iOS.
  • Aviator (6 people) — Google-level engineering productivity suite
  • Lariat Data (3 people) — Observability for Data Engineering Teams
  • Abstra (18 people) — Automate finance operations with Python and AI
  • Mach9 (25 people) — AI-native CAD software for civil engineering
  • Lightly (5 people) — Help ML teams label the right data

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