Zenable - Instantly auto-fix outputs from tools like Cursor, Windsurf, and Copilot to meet your company's quality and compliance standards using guardrails built with Policy as Code. The free tier includes 100 tools calls per day to the MCP server and 25 free automated pull request reviews per day via the GitHub App.
Keywords AI - The best LLM monitoring platform. One format to call 200+ LLMs with 2 lines of code. 10,000 free requests every month and $0 for platform features!
Portkey - Control panel for Gen AI apps featuring an observability suite & an AI gateway. Send & log up to 10,000 requests for free every month.
Braintrust - Evals, prompt playground, and data management for Gen AI. Free plan gives upto 1,000 private eval rows/week.
Findr - Universal search that lets you search all your apps, at once. Search assistant that lets you answer questions using your information. Free plan offers unlimited unified search and 5 co daily co pilot queries.
ReportGPT - AI Powered Writing Assistant. The entire platform is free as long as you bring your own API key.
Clair - Clinical AI Reference. Students have free access to the professional tool suite, which includes Open Search, Clinical Summary, Med Review, Drug Interactions, ICD-10 Codes, and Stewardship. Additionally, a free trial for the professional suite is available.
Langtrace - enables developers to trace, evaluate, manage prompts and datasets, and debug issues related to an LLM application’s performance. It creates open telemetry standard traces for any LLM which helps with observability and works with any observability client. Free plan offers 50K traces/month.
LangWatch - A LLMOps platform helping AI teams measure, monitor, and optimize LLM applications for reliability, cost-efficiency, and performance. With a powerful DSPy component, we enable seamless collaboration between engineers and non-technical teams to fine-tune and productionize GenAI products. Free plan includes all platform features, 1k traces/month and 1 workflow DSPy optimizers. #opensource
Comet Opik - Evaluate, test, and ship LLM applications across your dev and production lifecycles. #opensource
Langfuse - Open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications. Free forever plan includes 50k observations per month and all platform features. #opensource
Pollinations.AI - easy-to-use, free image generation AI with free API available. No signups or API keys required, and several option for integrating into a website or workflow. #opensource
Othor AI - An AI-native fast, simple, and secure alternative to popular business intelligence solutions like Tableau, Power BI, and Looker. Othor utilizes large language models (LLMs) to deliver custom business intelligence solutions in minutes. The Free Forever plan provides one workspace with five datasource connections for one user, with no limits on analytics. #opensource
OpenRouter - Provides various free AI models including DeepSeek R1, V3, Llama, and Moonshot AI. These models excel in natural language processing and are suitable for diverse development needs. Note that while these models are free to use, they are subject to rate limits. Additionally, OpenRouter offers paid models for more advanced requirements, for instance Claude, OpenAI, Grok, Gemini, and Nova.