Developer decision Enterprise evaluation

LangGraph vs Letta

Side-by-side comparison of LangGraph and Letta across fit, pricing, docs, evidence gaps, and benchmarks.

Decision brief

Best overall

LangGraph

Best combined signal across API availability, docs, adoption, reviews, and ecosystem proof.

Best OSS/self-hosted

LangGraph

Start here when local control, inspectability, or self-hosting matters.

Best managed/production

LangGraph

Strongest shortlist signal for API availability, docs, and operational maturity.

Decision notes

Adoption proof: No verified adoption proof yet

Reviews: No developer reviews yet

Repo stars: LangGraph

Check before choosing

LangGraph has no developer reviews yet.LangGraph has no public adoption proof yet.Letta has no developer reviews yet.Letta has no public adoption proof yet.

Evidence links

LangGraph docs LangGraph repo Letta docs Letta repo

Missing evidence and weekly return

LangGraph: verified adoptionLangGraph: benchmark dataLetta: verified adoptionLetta: benchmark data

Save this comparison to watch rank movement, new alternatives, docs changes, examples, and benchmark updates.

Next stepBuild packet and draft write-up

Turn this LangGraph vs Letta decision into something you can build from.

Most developers reading a head-to-head are picking what to ship this week. Take the LangGraph vs Letta decision into a build packet with the setup steps for whichever one you choose, and draft a short write-up of how it went so the next person deciding this has something concrete to read.

Comparing LangGraph vs Letta

LangGraph docs LangGraph GitHub Letta docs Letta GitHub

Build packet Draft proof page

Feature Comparison

LangGraph

AI Agents

Pricing: Open source
Open source: Yes
API: Available
Rating: No reviews
GitHub: 35,516 stars
Adoption: Public evidence pending
Benchmark: No benchmark data
Best for: Low-level orchestration framework for building stateful, long-running AI agents and agent
Tradeoff: More control and inspectability, but more setup and operational ownership.

Letta

AI Agents

Pricing: Freemium
Open source: Yes
API: Available
Rating: No reviews
GitHub: 23,530 stars
Adoption: Public evidence pending
Benchmark: No benchmark data
Best for: Stateful agent platform for long-running agents with memory and self-improving behavior.
Tradeoff: More control and inspectability, but more setup and operational ownership.

Feature	LangGraph	Letta
Category	AI Agents	AI Agents
Pricing	Open source	Freemium
Open source
API available
Rating	No reviews	No reviews
GitHub stars	35,516	23,530
Adoption	Public evidence pending	Public evidence pending
Benchmark	No benchmark data	No benchmark data
Best for	Low-level orchestration framework for building stateful, long-running AI agents and agent	Stateful agent platform for long-running agents with memory and self-improving behavior.
Developer tradeoff	More control and inspectability, but more setup and operational ownership.	More control and inspectability, but more setup and operational ownership.

Sponsored perks may appear below, but comparison order, evidence, and decision guidance are not bought placements. Decisions weigh verified usage, public product evidence, projects, saves, comparisons, and buyer requirements. Buyer shortlists stay private unless contact is requested.

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Feature

LangGraph

Letta