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Comparison · 2026
HumanLayer vs Substrate
HumanLayer vs Substrate: side-by-side comparison of pricing, ratings, and features on SoftwareVital (2026).
Feature lists share 0 overlapping items across the two listings.
free
API and SDK that lets AI agents pause and ask a human for approval or help, with replies sent through Slack, email, or Discord.
VS
free
Substrate is a platform for building compound AI systems from connected nodes, with vector storage, a code interpreter and agentic control flow.
Side-by-side
| Attribute | HumanLayer | Substrate |
|---|---|---|
| Rating | — | — |
| Reviews | — | — |
| Pricing | free | free |
| Votes | 0 | 0 |
| Category | AI Agent | AI Agent |
Features checklist
| Feature | HumanLayer | Substrate |
|---|---|---|
| Works with all popular frameworks | ||
| Send to Slack | ||
| Discord | ||
| Up to 10 active users | ||
| Remove HumanLayer Branding (BYO app/keys) | ||
| Advanced Approval Workflows w/ Escalations and Timeouts | ||
| Learning and Auto Approvals | ||
| Substrate is a platform for building compound AI systems |