Curated Technology Directory • Verified Free-Tier Boundaries

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Benchmarked directory of essential software, developer APIs, databases, and cloud infrastructure. We independently audit pricing, free-tier thresholds, and alternative ecosystems.

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Open Source

Self-hosted software, permissive libraries & frameworks

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Langfuse

Open Source

Open-source LLM engineering platform for tracing, evaluations, prompt management, and metrics.

Free Tier Allowance Verified: February 2026

100% free and open-source self-hosted under MIT license; Cloud Hobby plan provides 50,000 ingested traces/month with 30-day retention.

Full trace waterfall diagrams with span-level latency and token consumption metrics. SDK integrations for LangChain, LlamaIndex, OpenAI, Anthropic, and custom agents.

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Meta Llama

Open Source

Open-weights foundation models for private inference, fine-tuning, and on-premise AI deployments.

Free Tier Allowance Verified: February 2026

Completely free open weights under Meta Community License; free for research and commercial use up to 700M monthly active users.

Permissive open weights for research and commercial applications under 700M MAU. Extensive quantization options (Ollama, vLLM, GGUF, TensorRT-LLM, EXL2).

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