Results for “free tools”

33 tools in the directory · Updated 2 Nov 2026

“free tools”Ways to use: SDK / libraryBacked by Y CombinatorShowing 33 tools

Freestyle VMsby FreestyleYC S24Give AI agents persistent Linux machines for long-running tasksFreemium
Morphik Developer Platformby MorphikYC X25Document database for building agents and retrieval appsFreemium
PostHog AI Observabilityby PostHogYC W20Trace, evaluate, and cost-track LLM calls inside PostHogFreemium
Supabase Vectorby SupabaseYC S20Postgres vector database with pgvector for storing and searching embeddingsFreemium
Supervisionby RoboflowYC S20Reusable computer vision tools for datasets, detections, and video processingFree
Roboflowby RoboflowYC S20Vision AI platform for building, training, deploying and monitoring computer vision applications.Freemium
Recall.aiby Recall.aiYC W20API for capturing meeting recordings, transcripts, and metadataPay as you go
Phonicby PhonicYC W20Speech-to-speech models and tools for building voice agents.Freemium
Hyperbrowserby HyperbrowserYC S21Cloud browsers, sandboxes, and web data APIs for AI agentsFreemium
Openlayerby OpenlayerYC S21AI governance platform to test, monitor, and control AI systemsFreemium
Ollamaby OllamaYC W21Run and build with open AI models locally or in the cloudFreemium
OpenCodeby AnomalyYC W21Open source AI coding agent for terminal, desktop, and IDEFreemium
Firecrawlby FirecrawlYC S22Web data API that lets AI agents search, scrape, and crawl live web content, with a developer code and docs index.Freemium
Reality Defenderby Reality DefenderYC W22Deepfake detection API and platform for audio, video, images, and callsFreemium
Nyckelby NyckelYC W22Hosted REST API that turns labeled examples into reliable classification and detection predictions.Freemium
Epsillaby EpsillaYC S23A no-code and configurable platform for building domain-specific AI agents with private knowledge.Freemium
Skyvernby SkyvernYC S23AI agents that run browser workflows on any websiteFreemium
LiteLLMby LiteLLMYC W23Open-source AI gateway that puts many LLM providers behind one API with spend caps and routingFreemium
Langfuseby LangfuseYC W23Open-source platform for tracing, evaluating, and improving LLM and agent applicationsFreemium
Flowerby FlowerYC W23Build federated AI systems across distributed datasetsFreemium
Laminarby LaminarYC S24Trace AI agents and find recurring failures across their runsFreemium
Unsloth AIby Unsloth AIYC S24Open-source framework for fine-tuning and reinforcement learning of LLMsFreemium
Mem0by Mem0YC S24Persistent memory layer for AI agents and appsFreemium
Magic Hourby Magic HourYC W24Browser-based AI video, image, and audio creation with an APIFreemium