Letta vs Membase: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Letta and Membase side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Letta
Build AI agents that learn and improve from experience
Best for you if:
- • You want addresses a critical limitation in current AI: memory and continuous learning
Membase
Share source-linked long-term memory across AI agents and tools
Best for you if:
- • Developer teams of 1–20 whose agents and coding assistants need to share one long-term memory
| At a Glance | Letta | Membase |
|---|---|---|
Starts at | Free plan, paid from $20/mo, billed monthly Pro plan | Free 100% free |
Category | Developer Tools AI Agents | Data & Databases Developer Tools |
Rating | n/a | n/a |
Free plan | Yes | Yes |
Watch out for | Pay-as-you-go overage for Letta Auto | n/a |
Choose Letta or Membase?
Choose Letta if
- You want addresses a critical limitation in current AI: memory and continuous learning
- You want provides developer tools for building advanced, adaptive AI agents
- You work in developer tools, not data & databases
Choose Membase if
- Developer teams of 1–20 whose agents and coding assistants need to share one long-term memory
- You want a fully free tool (Letta requires payment)
- You work in data & databases, not developer tools
In-Depth Analysis
Letta
Build AI agents that learn and improve from experience
Letta's pricing seems fair, offering a free tier for basic exploration and a Pro tier at $20/month for personal use with a decent agent allowance.
Watch out
Pay-as-you-go overage for Letta Auto
Strengths
- Pro: Addresses a critical limitation in current AI: memory and continuous learning.
- Pro: Provides developer tools for building advanced, adaptive AI agents.
- Pro: Backed by significant research and expertise from leading AI institutions.
- Pro: Emphasizes open AI principles and developer empowerment.
Weaknesses
- Con: The technology is highly specialized, potentially requiring advanced AI development knowledge.
- Con: Specific pricing and availability details for products like the SDK are not readily apparent.
- Con: The focus on foundational research means some applications may still be emerging.
Key features
Membase
Share source-linked long-term memory across AI agents and tools
Without pricing, it is impossible to compare value against the market.
Key features
Plans and prices: Letta vs Membase
| Tool | Plans and prices | Source |
|---|---|---|
| Letta |
| letta.com/pricing read Oct 16, 2026 |
| Membase | No plan prices on file | membase.com |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Letta pricing and Membase pricing.
Key Takeaways
Letta
- Choose if you want build AI agents that learn and improve from experience
Membase
- Choose if you want share source-linked long-term memory across AI agents and tools
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Letta starts at $20/mo, billed monthly; Membase has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Letta and Membase compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Letta starts at $20/mo, billed monthly; Membase has no public paid plan price on file. Both have a free plan.
What are Letta and Membase used for?
Letta: Build AI agents that learn and improve from experience. Membase: Share source-linked long-term memory across AI agents and tools.
What does Letta cost vs Membase?
Letta's cheapest paid plan is Pro at $20/mo, billed monthly; it also has a free plan. Membase is free. Prices read on the vendors' pricing pages, latest check Oct 16, 2026.
What's the main difference between Letta and Membase?
Letta's main strength: addresses a critical limitation in current AI: memory and continuous learning. Membase focuses on share source-linked long-term memory across AI agents and tools.