Letta vs Relevance AI

Comprehensive side-by-side comparison — features, pricing, performance, and more.

Data last refreshed October 2026

Letta

Machines that learn — self-improving AI agents (from the creators of MemGPT)

Open Source

78% verification coverage

Relevance AI

OnSearch Pty Ltd

Specialist agents for every task

Paid

80% verification coverage

Trust & Reliability

Letta

Uptime:99.96% (365-day)Status page

Customers (per vendor):Bilt, 11x, Kognitos +1

GDPR

Relevance AI

Customers (per vendor):Canva, Autodesk, Lightspeed Commerce +5

GDPR

SOC 2

Overall Winner: Relevance AI

7.3/10 vs Letta at 5.8/10

Leads in:

Customization

Integration

Performance

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

AI Comparison Summary

Letta

5.8

avg score

Relevance AI

7.3

avg score

Relevance AI leads overall — particularly in Integration and Compliance & Data Protection and 1 more.

Letta has an edge in Support.

Based on 6 dimensions

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

Overall Winner

Relevance AI

7.3 / 10

Letta

Best For

Developers building AI agents for automated workloads

Teams creating custom agents with shared resources and permissions

Individuals using stateful agents for personal use

Enterprises requiring high-volume agent deployments with custom pricing

Relevance AI

Best For

Enterprise teams looking to scale AI agent deployment

Organizations aiming to automate complex workflows

Sales teams needing to personalize outbound engagement

Customer success teams managing renewals and inbounds

* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology

Letta is best for

✍️Writing & Content8.0💬Chat & Conversation8.0🤖Automation & Agents7.1

Relevance AI is best for

🤖Automation & Agents7.5💬Chat & Conversation6.3🎧Customer Support6.0

Filter by your use case:

Limitations

Letta

Cons

Free plan is limited to 3 stateful agents
Personal Plans require OAuth authentication
Developer Plans use API key authentication
Tool execution on the API Plan is usage-based
Letta Auto usage is quota-limited on Pro plans
Data collection for hosted services may be used for model training

Relevance AI

Cons

Multi-agent systems like the BDR agent are only available via the sales team.
The platform is primarily designed for enterprise teams, suggesting a higher barrier to entry for smaller businesses.
Specific details on data retention periods are not explicitly stated beyond general security measures.
The pricing for enterprise features is custom and requires contacting sales, lacking transparency for initial budgeting.

Weighted Score — Adjust What Matters to You

Pick a profile or drag sliders — scores and radar update instantly on the right.

Quick profiles:

Ease of Use5

Customization5

Support5

Integration5

Compliance & Data Protection5

Performance5

Planning Quality5

Dimension Comparison

Letta

5.8

/ 10

Relevance AI

7.3

/ 10

Clear winner

Dimension Breakdown

Ease of Use

How intuitive is onboarding, UI navigation, and day-to-day usage for the target audience?

Letta

1.0

Relevance AI

2.0▲ +1.0

Customization

Calculated

How much can users tailor workflows, settings, prompts, or outputs to their needs?

Letta

9.0

Relevance AI

10.0▲ +1.0

Support

How strong is the documentation, customer support, community, and learning resources?

Letta

10.0▲ +2.0

Relevance AI

8.0

Integration

Calculated

How well does it connect with other tools, APIs, and workflows?

Letta

7.0

Relevance AI

10.0▲ +3.0

Compliance & Data Protection

Calculated

Compliance certifications and data-protection posture, counted from ten verified signals: SOC 2 Type II, GDPR compliance, HIPAA, WCAG AA/AAA, PII redaction, licensed-only training, a published sub-processor list, a downloadable DPA, not training on user data, and a documented deletion path

Letta

3.0

Relevance AI

6.0▲ +3.0

Performance

Calculated

Latency + throughput speed

Letta

5.0

Relevance AI

8.0▲ +3.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Letta

—

Relevance AI

—

Calculated = derived from structured signals (integration count, API/open-source config, compliance certs, response-time). AI = LLM-assessed from public website content. Methodology

Task Performance

Letta

Task

Relevance AI

8.0

Role Definition

8.0

Task Decomposition

7.0

Agent Coordination

8.0

6.0

Inter Agent Communication

7.0

Workflow Orchestration

8.0

7.0

Tool Use Delegation

8.0

9.0

State Management

7.0

5.0

Error Recovery

7.0

5.0

Observability

8.0

Scalability Throughput

7.0

6.0

Workflow Building

8.0

6.0

Trigger Variety

9.0

* Task scores (1–10) are algorithmically generated from publicly available data.

Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy

Frequently Asked Questions

What are the main differences between Letta and Relevance AI?

Letta — "Machines that learn — self-improving AI agents (from the creators of MemGPT)". Relevance AI — "Specialist agents for every task". The Features section on this page compares them side by side.

Who is Letta best for compared with Relevance AI?

Letta is best for Developers building AI agents for automated workloads; and for Teams creating custom agents with shared resources and permissions. Relevance AI is best for Enterprise teams looking to scale AI agent deployment; and for Organizations aiming to automate complex workflows.

How does the pricing of Letta compare with Relevance AI?

Letta is open source, includes a free plan, paid plans start at $20/month. Relevance AI is paid, includes a free plan, offers a free trial. Always verify current pricing with the vendor.

Does Letta or Relevance AI have a free plan?

Letta is open source. Relevance AI has a free plan and offers a free trial. Always verify current pricing with the vendor.

Do Letta and Relevance AI offer an API?

Letta offers a public API. Relevance AI offers a public API.

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