Letta vs Dify

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

Dify

LangGenius, Inc.

The Platform for Production-Ready Agentic Workflows

Freemium

86% verification coverage

Trust & Reliability

Letta

Uptime:99.96% (365-day)Status page

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

GDPR

Dify

Uptime:99.98%Status page

Users:1M-10M

Customers (per vendor):Maersk, ETS, Anker +1

GDPR

SOC 2

Overall Winner: Dify

8.0/10 vs Letta at 5.8/10

Leads in:

Integration

Performance

Ease of Use

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

Dify

8.0

avg score

Dify leads overall — particularly in Ease of Use and Compliance & Data Protection and 1 more.

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

Dify

8.0 / 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

Dify

Best For

Independent developers building production AI apps

Small teams building production AI apps

Medium-sized teams needing collaboration and higher throughput

Enterprises requiring advanced security, compliance, and dedicated support

* 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

Dify is best for

🎨Image & Design8.0🎧Customer Support8.0🤖Automation & Agents6.9

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

Dify

Cons

App Version Control is listed as 'Coming Soon' for Professional and Team plans.
Pay by Invoice via bank transfer is not yet available, only for annual Team subscriptions.
Some models cannot be used with message credits and require an own API key.
The Sandbox plan has limited message credits, team members, apps, knowledge documents, and data storage.
The Sandbox plan has a 30-day log history limit.
The Community Edition is for non-commercial projects and complies with Dify Open Source License.

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

Dify

8.0

/ 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

Dify

7.0▲ +6.0

Customization

Calculated

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

Letta

9.0

Dify

9.0

Support

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

Letta

10.0

Dify

10.0

Integration

Calculated

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

Letta

7.0

Dify

8.0▲ +1.0

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

Dify

6.0▲ +3.0

Performance

Calculated

Latency + throughput speed

Letta

5.0

Dify

8.0▲ +3.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Letta

—

Dify

—

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

Dify

8.0

Role Definition

6.0

8.0

Task Decomposition

6.0

7.0

Agent Coordination

7.0

6.0

Inter Agent Communication

6.0

7.0

Workflow Orchestration

9.0

7.0

Tool Use Delegation

8.0

9.0

State Management

7.0

5.0

Error Recovery

6.0

5.0

Observability

7.0

8.0

Scalability Throughput

7.0

6.0

Workflow Building

9.0

6.0

Trigger Variety

8.0

* 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 Dify?

Letta — "Machines that learn — self-improving AI agents (from the creators of MemGPT)". Dify — "The Platform for Production-Ready Agentic Workflows". The Features section on this page compares them side by side.

Who is Letta best for compared with Dify?

Letta is best for Developers building AI agents for automated workloads; and for Teams creating custom agents with shared resources and permissions. Dify is best for Independent developers building production AI apps; and for Small teams building production AI apps.

How does the pricing of Letta compare with Dify?

Letta is open source, includes a free plan, paid plans start at $20/month. Dify is freemium, includes a free plan, paid plans start at $59/month. Always verify current pricing with the vendor.

Does Letta or Dify have a free plan?

Letta is open source. Dify has a free plan. Always verify current pricing with the vendor.

Do Letta and Dify offer an API?

Letta offers a public API. Dify offers a public API.

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