AI tools tagged Y Combinator

14 tools matching this tag.status

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Replicate

Fine-tuning · Thousands of community + first-party models

8.5

One-API platform for running and fine-tuning open-source models.

Paid· Pay-per-second of GPU timemodel hostingfine-tuning

Skyvern

Agents · Multi-model (OpenAI, Anthropic, Gemini, Ollama)

8.3

AI browser agent that automates web workflows from natural-language instructions, with CAPTCHA and 2FA handling built in.

Freemium· Free: $0/month · Hobby: $29/month · Pro: $149/month · Enterprise: Custom/monthbrowser-automationdata-extraction

AgentOps

Agents · Multi-model

8.2

Observability and debugging platform purpose-built for AI agents, with time-travel replay and cost tracking across 400+ LLMs.

Freemium· Free up to 5,000 events; Pro from $40/mo; Enterprise customagent-observabilityllm-tracing

Chroma

RAG · Hosted vector DB (not an LLM)

8.1

Embedded, developer-friendly vector store for Python.

Freemium· Starter: $0 · Team: $250 · Enterprise: Customprototypingembedded RAG

Firecrawl

RAG · Claude, Cursor, Windsurf, OpenAI, Gemini

8.0

Web scraping and crawling API that returns LLM-ready markdown, JSON, or structured data from any URL.

Freemium· Free Plan: $0 · Hobby: $16 · Standard: $83 · Growth: $333 · Scale: $599/monthlyweb-scrapingrag-ingestion

Lamini

Fine-tuning · Lamini (built on open base models)

7.7

Memory-tuning platform for grounding LLMs in your facts.

Paid· Enterprise / contact salesenterprise FTfactual recall

Application Signal

RAG

Evidence-led YC positioning analysis for founders

Freemium· Public directory free; private PDF analysis requires sign-in (pricing not publicly disclosed).YC application positioning checkStartup market-map exploration

Bland AI

Audio · Proprietary in-house voice models

Enterprise voice AI for automated phone calls at scale

Enterprise· Start: $0 · Build: $299 · Scale: $499 · Enterprise: CustomOutbound appointment remindersInsurance claims intake calls

Cluely

Writing

Real-time AI meeting assistant that takes notes and answers questions while you talk

Freemium· Starter: Free · Pro: $19.99 · Pro + Undetectability: $149.99Live sales call coachingReal-time meeting transcription

Composio

Agents · Model-agnostic (works with Claude, GPT-4o, Gemini, Llama, and other frontier and open-weights models via SDK integrations)

Auth, tools, and sandboxed execution for AI agents across 1,000+ apps

Freemium· Totally Free: $0 · Ridiculously Cheap: $29 · Serious Business: $229Customer support agent triaging Gmail and filing Linear ticketsSales agent updating HubSpot and posting to Slack

Factory AI (Droids)

Coding · Model-agnostic: GPT-5, Claude Opus/Sonnet, Gemini, plus open-weight models

Agent-native platform that runs the whole software development lifecycle with autonomous Droids.

Freemium· Pro: $20 · Plus: $100 · Max: $200 · Business: ? · Enterprise: ?Autonomous ticket-to-PR feature workLarge-scale codebase refactors

Retell AI

Audio · LLM-agnostic (OpenAI, Anthropic, Google and others selectable per agent); proprietary turn-taking model and voice pipeline in-house

Build, test and deploy production-grade AI voice agents for inbound and outbound calls.

Freemium· Pay-as-you-go: $0.07-$0.31/minute · Enterprise: Custom PricingAI inbound call answeringOutbound lead qualification

Stagehand

Agents · Model-agnostic (OpenAI GPT-4o, Anthropic Claude, Google Gemini via Vercel AI SDK)

The SDK for browser agents

Freemium· SDK is free/open-source (MIT). Runs locally against any LLM API key. Optional Browserbase cloud runtime: Free $0/mo, Developer $20/mo, Startup $99/mo, Scale custom.AI web scrapingAutonomous browser agents

Vapi

Audio · Model-agnostic: OpenAI GPT-4o, Anthropic Claude, Google Gemini, Groq, DeepSeek, Llama; STT/TTS via Deepgram, ElevenLabs, PlayHT, Cartesia, Azure

Developer platform for building, deploying, and scaling production voice AI agents

Freemium· Build: Usage based · Scale: Contact UsAI phone receptionistOutbound lead qualification calls