Helicone Alternatives 2026: Best LLM Observability Tools After the Mintlify Acquisition
Helicone was acquired by Mintlify on March 3, 2026, and the platform has been in maintenance mode ever since — receiving only security patches, bug fixes, and support for new model identifiers. If you depend on Helicone in production today, your migration window is open. The strongest replacements are Langfuse (open-source, SDK-based, 40,000+ active builders), LangSmith (deepest LangChain integration available), Portkey (200+ LLM provider gateway), Braintrust (eval-first with 1M free spans per month), and Stockyard (a single ~25MB Go binary requiring zero cloud dependency). ...