Composio vs Letta
Composio vs Letta, compared side by side on 18 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Composio is on 57/100 and Letta on 35/100.
Where each one leads
Composio
- our overall score: 57/100 against 35/100
- agent readiness: 56/100 against 49/100
- headcount: 68 against 15
- LinkedIn following: 14,661 against 5,596
Letta
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Composio | Letta |
|---|---|---|
| What it is | AI skill layer enabling agents to reliably interact with over 3000 real-world tools and APIs. | An operating system for building stateful AI agents, managing context, memory, and resource allocation. |
| Category | Agentic AI, AI Agent, Foundation Model, API Platform | Agentic AI, AI Agent, Foundation Model, Operating System |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Software |
| Founded | 2023 | 2023 |
| Headquarters | San Francisco, United States | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Composio | Letta |
|---|---|---|
| Employees | 68 | 15 |
| Open roles | 32 | Not published |
| Total funding | $50.0M | Not published |
| Latest round | Seed | Not published |
| LinkedIn followers | 14,661 | 5,596 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Composio | Letta |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 57/100 | 35/100 |
| Traction | 57/100 | 12/100 |
| Team | Not published | 60/100 |
| Search visibility | 61/100 | 32/100 |
| Quality | 68/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (56/100) | D (49/100) |
| Domain ratingLink authority, 0-100 | 76/100 | 72/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Composio | Letta |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Cloudflare | Cloudflare |
| Frameworks | Next.js, Tailwind CSS | Not detected |
| Analytics | Google Analytics 4, Google Tag Manager | Plausible |
| Open source | Yes | Yes |
Product and pricing
| Measure | Composio | Letta |
|---|---|---|
| Key features | 3000+ Adaptable Tool Integrations, Seamless LLM & Agent Interaction, Simplified Authentication & API Management, Real-time Learning & Intuition Building, Scalable Tool Execution, Composio Startup Program | Stateful Agent OS, Advanced Context & Memory Management, Tool Rules for Reliability, Agents-as-a-Service Deployment, Agent Development Environment, Custom Tool Integration |
What users say
| Measure | Composio | Letta |
|---|---|---|
| Reddit sentimentThreads we track | 1 positive, 5 negative across 6 threads | Not published |
“Trying to figure out a way for Claude Code to scour social sites for specific posts, I stumbled across a platform called Composio. At a glance its MCP functionality seems very clever - log into all your services there and just set one MCP u”r/ClaudeAI
Composio vs Letta: common questions
Which is better, Composio or Letta?
On our 0-100 score Composio rates higher (57/100 against 35/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 18 data points above: read the rows that match what you are buying for.
How do Composio and Letta compare on the numbers?
Composio leads on our overall score (57/100 against 35/100), agent readiness (56/100 against 49/100), headcount (68 against 15), LinkedIn following (14,661 against 5,596).
What do real users say about Composio and Letta?
Composio: 1 positive and 5 negative mentions across 6 Reddit threads we track, mostly in r/ClaudeAI.
Read the full Composio review and pricing or the Letta review and pricing. You can also browse other Composio alternatives we track.