HumanLayer VS Fact0
Compare HumanLayer VS Fact0, what is the difference between HumanLayer and Fact0?
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Summarize
HumanLayer summarize
HumanLayer is an API and SDK that enables tool-calling AI Agents to contact humans for help, feedback, and approvals.
HumanLayer Landing Page
Fact0 summarize
Log every autonomous action, tool call, and human approval in a tamper-evident cryptographic chain. Pass enterprise security reviews in days, not months.
Fact0 Landing Page
Compare Details
HumanLayer details
| Categories | AI Agent, AI API, AI Developer Tools, AI Workflow, Large Language Models (LLMs) |
| HumanLayer Website | https://humanlayer.dev?utm_source=toolify |
| Added Time | December 07 2024 |
| HumanLayer Pricing | -- |
Fact0 details
| Categories | AI Agent |
| Fact0 Website | https://fact0.io?utm_source=toolify |
| Added Time | June 17 2026 |
| Fact0 Pricing | -- |
Comparison of usage
How to use HumanLayer?
Integrate the HumanLayer SDK into your AI agent workflow. Use the @hl.require_approval() decorator to block function calls requiring human oversight. Contact humans through various channels and route approvals to specific teams or individuals.
How to use Fact0?
Developers can integrate Fact0 into their backend using the Python SDK to start logging agent actions, tool permissions, and human overrides. Once integrated, teams can monitor real-time activity feeds via the dashboard, visualize execution steps via a DAG, generate signed compliance evidence packs, and ask questions about logs in plain English using the built-in Fact0 Spotlight AI assistant.
Compare Pros between HumanLayer and Fact0
Core features of HumanLayer
- Require Human Approval for Function Calls
- OmniChannel Contact (Slack, Email, Discord)
- Advanced Approval Workflows with Escalations and Timeouts
- Human as Tool (hl.human_as_tool())
- Granular Routing of Approvals
- LLM and Framework Agnostic
Core features of Fact0
- Tamper-Evident History with SHA-256 chained logs and Ed25519 digital signatures
- Tool Boundary Logging to track execution, input parameters, and output results
- Signed Evidence Packs for procurement-ready CISO compliance sharing
- Execution DAG for interactive timeline visualization, replay, and debugging
- Fact0 Spotlight AI assistant for natural-language questioning over audit logs
- Async, non-blocking batching to preserve agent loop performance
Compare Use Cases
Use cases for HumanLayer
- AI agents requiring human approval for critical decisions.
- Workflows needing human feedback to improve agent performance.
- Agentic AI workflows that need human oversight for production-grade reliability.
- Automated lead generation with human feedback on lead quality.
Use cases for Fact0
- Fintech loan & payment agents proving approvals, rejections, and overrides for regulators
- Healthcare clinical assistants tracking access to patient data with identity logs
- Autonomous support bots showing exact changes, refunds, or customer escalations
- Legal and HR document workflows maintaining audit trails for deletes and AI summaries
Different Plan between HumanLayer and Fact0
HumanLayer
$0/month
Free forever for Hackers and Tinkerers. Works with all popular frameworks. 100 operations/month. Pay as you go ($20/200 addt'l). Send to Slack, Email, Discord. Up to 10 active users. Limited Data Retention.
$500/month
Collaborate and scale. Remove HumanLayer Branding (BYO app/keys). Includes 2000 operations/month ($18/200 add'l). Advanced Approval Workflows w/ Escalations and Timeouts. Learning and Auto Approvals. Channels for MSTeams, SMS, RCS. Priority Support. 180-day retention on feedback datasets export.
Custom
Deploy into your Private VPC or on-prem. RBAC and SSO support. Volume discounts. Custom notification channels. Expert Advice on custom-built agents for sales, marketing, hiring, and more.
Fact0
$0 per month
30,000 audit events/mo, 5 GB storage, 30-day retention, 1 team seat, 5 evidence exports/mo, core platform features like append-only ledger and Python SDK.
$79 per month
500,000 audit events/mo, 50 GB storage, 90-day retention, 5 team seats included, Slack & PagerDuty alerts, 99.9% Uptime SLA, unlimited active share links, execution DAG replay & debug, real-time Webhook alerts.
Custom
Unlimited scale, custom retention, unlimited seats & evidence exports, SAML/SSO & SCIM, Bring Your Own Key (BYOK), self-host or private VPC deployment, custom SLAs, and custom feature requests.
HumanLayer's traffic
HumanLayer is the one with 197.4K monthly visits and 00:00:24 Avg.visit duration. HumanLayer has a Page per visit of 1.54 and a bounce rate of 48.52%.
Visit Over Time
| Monthly Visits | 197.4K |
| Avg·visit Duration | 00:00:24 |
| Page per Visit | 1.54 |
| Bounce Rate | 48.52% |
Fact0's traffic
Fact0 is the one with 0 monthly visits and 00:00:00 Avg.visit duration. Fact0 has a Page per visit of 0.00 and a bounce rate of 0.00%.
Visit Over Time
| Monthly Visits | 0 |
| Avg·visit Duration | 00:00:00 |
| Page per Visit | 0.00 |
| Bounce Rate | 0.00% |
Geography
The top 5 countries/regions for HumanLayer are:Vietnam 21.08%, United States 10.63%, China 6.89%, India 3.53%, South Korea 2.74%
Top 5 Countries/regions
 | 21.08% |
 | 10.63% |
 | 6.89% |
 | 3.53% |
 | 2.74% |
Geography
Sorry, there are no data
Traffic Sources
The 6 main sources of traffic to HumanLayer are:vs_sourcesSearchOrganic 41.63%, Direct 27.16%, Referrals 15.87%, vs_sourcesSocialOrganic 11.21%, vs_sourcesGenAi 3.42%, Mail 0.71%, vs_sourcesAffiliate 0.00%, vs_sourcesDisplayAds 0.00%, vs_sourcesSearchPaid 0.00%, vs_sourcesSocialPaid 0.00%
vs_sourcesSearchOrganic | 41.63% |
Direct | 27.16% |
Referrals | 15.87% |
vs_sourcesSocialOrganic | 11.21% |
vs_sourcesGenAi | 3.42% |
Mail | 0.71% |
vs_sourcesAffiliate | 0.00% |
vs_sourcesDisplayAds | 0.00% |
vs_sourcesSearchPaid | 0.00% |
vs_sourcesSocialPaid | 0.00% |
Traffic Sources
The 6 main sources of traffic to Fact0 are:Mail 0, vs_sourcesGenAi 0, Direct 0, vs_sourcesAffiliate 0, Referrals 0, vs_sourcesDisplayAds 0, vs_sourcesSearchPaid 0, vs_sourcesSocialPaid 0, vs_sourcesSearchOrganic 0, vs_sourcesSocialOrganic 0
Mail | 0 |
vs_sourcesGenAi | 0 |
Direct | 0 |
vs_sourcesAffiliate | 0 |
Referrals | 0 |
vs_sourcesDisplayAds | 0 |
vs_sourcesSearchPaid | 0 |
vs_sourcesSocialPaid | 0 |
vs_sourcesSearchOrganic | 0 |
vs_sourcesSocialOrganic | 0 |
Which is better: HumanLayer or Fact0?
HumanLayer might be a bit more popular than Fact0.As you can see, HumanLayer has 197.4K monthly visits, while Fact0 has 0 monthly visits. So more people choose HumanLayer. So the odds are that people will recommend HumanLayer more on social platforms.
HumanLayer has an Avg.visit duration of 00:00:24, while Fact0 has an Avg.visit duration of 00:00:00. Also, HumanLayer has a page per visit of 1.54 and a Bounce Rate of 48.52%. Fact0 has a page per visit of 0.00 and a Bounce Rate of 0.00%.
The main users of HumanLayer are Vietnam, United States, China, India, South Korea, with the following distribution: 21.08%, 10.63%, 6.89%, 3.53%, 2.74%.
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