20+ Best Alternatives to Letta in 2026
Memory-first agents that learn and improve from experience with natural language.
Looking for an alternative to Letta? Below are 20 AI startups working in the same space — ranked by our Neuron score so the most credible options come first. Each card shows what makes the tool a viable substitute, pricing signals, and funding stage.
- 1View alternative →
Zhipu AI
$1.5BChinese foundation model lab behind ChatGLM and GLM-4.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free
- 2View alternative →
DeepSeek
UndisclosedOpen-weights frontier AI models with breakthrough efficiency.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free
- 3View alternative →
ServiceNow AI Research
UndisclosedShaping the future of work with AI by advancing enterprise intelligence through human-centered and scalable solutions.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Enterprise · Contact sales
- 4View alternative →
Aleph Alpha
UndisclosedSpecialised language models for a sovereign Europe, designed for real, business-critical environments and decisions.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Enterprise · Contact sales
- 5View alternative →
GitHub Copilot
UndisclosedThe world's most adopted AI code assistant — 1M+ developers inside GitHub
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free · From $10/mo
- 6View alternative →
Magic
UndisclosedBuilding frontier code models to automate software engineering and research.
Why it's similar: Shares categories with Letta — AI Developer Tools, Foundation Models.
💵 Enterprise · Contact sales
- 7View alternative →
Cursor
$7.6BThe AI code editor built for productive engineers.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free · From $20/mo
- 8View alternative →
Imbue
$232MTools to empower humans in the AI age with reliable, collaborative coding agents.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free
- 9View alternative →
JetBrains AI Assistant
UndisclosedAI inside IntelliJ, PyCharm, WebStorm — code without leaving your JetBrains IDE
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free · From $8/mo
- 10View alternative →
Kiro
UndisclosedAmazon's spec-driven AI IDE — build with PRDs, not prompts
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Freemium
- 11View alternative →
xAI
$56BAI designed to understand the universe
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Paid
- 12View alternative →
Mistral AI
$6.3BOpen and efficient foundation models
Why it's similar: Shares categories with Letta — AI Agents, Foundation Models.
💵 Free
- 13View alternative →
Cognition
$1.1BApplied AI lab building Devin, the AI software engineer.
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free · From $500/mo
- 14View alternative →
MiniMax
$2.2BChinese AI lab behind Hailuo video and Talkie companions.
Why it's similar: Shares categories with Letta — AI Developer Tools, Foundation Models.
💵 Freemium
- 15View alternative →
01.AI
$200MFounded by Kai-Fu Lee — maker of the Yi model family.
Why it's similar: Shares categories with Letta — AI Agents, Foundation Models.
💵 Freemium
- 16View alternative →
Moonshot AI
$300MMaker of Kimi — the long-context AI chatbot.
Why it's similar: Shares categories with Letta — AI Agents, Foundation Models.
💵 Free
- 17View alternative →
Bloop
$11MUnderstand any codebase instantly — semantic code search powered by AI
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free
- 18View alternative →
Writer
$321MFull-stack generative AI for enterprise
Why it's similar: Shares categories with Letta — AI Agents, Foundation Models.
💵 Enterprise · From $29/mo
- 19View alternative →
Inflection AI
$650MPersonal AI for everyone
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Free
- 20View alternative →
Adept AI
$350MAI that takes actions in any software
Why it's similar: Shares categories with Letta — AI Agents, AI Developer Tools.
💵 Enterprise · Contact sales
Frequently asked questions
What are the best alternatives to Letta?
The top-ranked alternatives to Letta on NeuronFeed are Zhipu AI, DeepSeek, ServiceNow AI Research, Aleph Alpha, GitHub Copilot. Rankings are based on our Neuron score, which weighs funding, momentum and editorial signal.
Is there a free alternative to Letta?
Yes — Zhipu AI, DeepSeek, GitHub Copilot offer a free plans. See the pricing column for each alternative above.
How is this list ranked?
We rank alternatives by shared categories with Letta, then by our proprietary Neuron score (0–100) which combines funding, team quality, momentum, and editorial input. The list refreshes every 30 days.
Letta vs Zhipu AI — which is better?
It depends on use case. Zhipu AI (Chinese foundation model lab behind ChatGLM and GLM-4.) is the #1-ranked alternative. See the full side-by-side at /compare/letta-vs-zhipu-ai.
Explore more around Letta
Contextual paths to related AI startups, deals and rankings.