Letta vs Inngest Agent

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

Data last refreshed August 2026

Letta

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

Open Source

78% verification coverage

Inngest Agent

Inngest

Durable Execution for Workflows & AI — unbreakable agents, invisible infra

Freemium

78% verification coverage

Trust & Reliability

Letta

Uptime:99.96% (365-day)Status page

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

GDPR

Inngest Agent

Uptime:99.11% (90-day)Status page

Users:10K-100K

Customers (per vendor):Cohere, Day AI, Otto +3

GDPR

SOC 2

HIPAA

Overall Winner: Inngest Agent

6.8/10 vs Letta at 5.8/10

Leads in:

Performance

Ease of Use

Compliance & Data Protection

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

Inngest Agent

6.8

avg score

Inngest Agent leads overall — particularly in Ease of Use and Performance.

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

Inngest Agent

6.8 / 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

Inngest Agent

Best For

Developers building event-driven AI agents and workflows at scale

Teams needing robust background job processing with built-in reliability

Organizations requiring fine-grained control over errors and execution flow

Engineers replacing their serverless background job stack

* 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

Inngest Agent is best for

🤖Automation & Agents4.1💻Coding & Dev3.0📊Data & Analytics3.0

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

Inngest Agent

Cons

Free plan has limited executions, span data, and trace retention
Datadog integration is part of a $300 advanced observability add-on

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

Inngest Agent

6.8

/ 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

Inngest Agent

4.0▲ +3.0

Customization

Calculated

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

Letta

9.0▲ +1.0

Inngest Agent

8.0

Support

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

Letta

10.0

Inngest Agent

10.0

Integration

Calculated

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

Letta

7.0

Inngest Agent

7.0

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

Inngest Agent

4.0▲ +1.0

Performance

Calculated

Latency + throughput speed

Letta

5.0

Inngest Agent

8.0▲ +3.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Letta

—

Inngest Agent

—

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

Inngest Agent

8.0

Role Definition

3.0

8.0

Task Decomposition

3.0

7.0

Agent Coordination

3.0

6.0

Inter Agent Communication

3.0

7.0

Workflow Orchestration

8.0

7.0

Tool Use Delegation

3.0

9.0

State Management

3.0

5.0

Error Recovery

9.0

5.0

Observability

8.0

Scalability Throughput

7.0

6.0

Workflow Building

7.0

6.0

Trigger Variety

6.0

* 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 Inngest Agent?

Letta — "Machines that learn — self-improving AI agents (from the creators of MemGPT)". Inngest Agent — "Durable Execution for Workflows & AI — unbreakable agents, invisible infra". The Features section on this page compares them side by side.

Who is Letta best for compared with Inngest Agent?

Letta is best for Developers building AI agents for automated workloads; and for Teams creating custom agents with shared resources and permissions. Inngest Agent is best for Developers building event-driven AI agents and workflows at scale; and for Teams needing robust background job processing with built-in reliability.

How does the pricing of Letta compare with Inngest Agent?

Letta is open source, includes a free plan, paid plans start at $20/month. Inngest Agent is freemium, includes a free plan, paid plans start at $99/month, offers a free trial. Always verify current pricing with the vendor.

Does Letta or Inngest Agent have a free plan?

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

Do Letta and Inngest Agent offer an API?

Letta offers a public API. Inngest Agent offers a public API.

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