Inngest Agent vs Letta

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

Data last refreshed August 2026

Inngest Agent

Inngest

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

Freemium

78% verification coverage

Letta

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

Open Source

78% verification coverage

Trust & Reliability

Inngest Agent

Uptime:99.11% (90-day)Status page

Users:10K-100K

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

GDPR

SOC 2

HIPAA

Letta

Uptime:99.96% (365-day)Status page

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

GDPR

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

Inngest Agent

6.8

avg score

Letta

5.8

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

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

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

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

Inngest Agent is best for

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

Letta is best for

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

Filter by your use case:

Limitations

Inngest Agent

Cons

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

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

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

Inngest Agent

6.8

/ 10

Clear winner

Letta

5.8

/ 10

Dimension Breakdown

Ease of Use

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

Inngest Agent

4.0▲ +3.0

Letta

1.0

Customization

Calculated

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

Inngest Agent

8.0

Letta

9.0▲ +1.0

Support

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

Inngest Agent

10.0

Letta

10.0

Integration

Calculated

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

Inngest Agent

7.0

Letta

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

Inngest Agent

4.0▲ +1.0

Letta

3.0

Performance

Calculated

Latency + throughput speed

Inngest Agent

8.0▲ +3.0

Letta

5.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Inngest Agent

—

Letta

—

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

Inngest Agent

Task

Letta

3.0

Role Definition

8.0

3.0

Task Decomposition

8.0

3.0

Agent Coordination

7.0

3.0

Inter Agent Communication

6.0

8.0

Workflow Orchestration

7.0

3.0

Tool Use Delegation

7.0

3.0

State Management

9.0

Error Recovery

5.0

8.0

Observability

5.0

7.0

Scalability Throughput

8.0

7.0

Workflow Building

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 Inngest Agent and Letta?

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

Who is Inngest Agent best for compared with Letta?

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. Letta is best for Developers building AI agents for automated workloads; and for Teams creating custom agents with shared resources and permissions.

How does the pricing of Inngest Agent compare with Letta?

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

Does Inngest Agent or Letta have a free plan?

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

Do Inngest Agent and Letta offer an API?

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

Explore Alternatives

Inngest Agent Alternatives

Tools similar to Inngest Agent

Letta Alternatives

Tools similar to Letta

Compare More AI Tools

Use our comparison tool to compare up to 5 AI tools side-by-side with AI-powered recommendations.