Compare HumanLayer VS Waldo, what is the difference between HumanLayer and Waldo?








HumanLayer is an API and SDK that enables tool-calling AI Agents to contact humans for help, feedback, and approvals.
HumanLayer Landing Page

Tell Kennel your goal and it does the rest. Say "make a blue circle" - Kennel works out the size, colour, placement from what the project already knows. It forms a contract, and hands each piece of the goal to the best agents available (Codex, Claude, OpenCode, etc) under authority you grant / revoke. It manages the agent coordination and brings back what needs your judgment, and what's still open. No more babysitting agents or forgetting what you set out to do.
Waldo Landing Page


| 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 | -- |
| Categories | AI Agent, AI Assistant, AI Workflow, AI Productivity Tools, AI Healthcare |
| Waldo Website | https://www.heywaldo.in?utm_source=toolify |
| Added Time | September 22 2026 |
| Waldo Pricing | -- |
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.
Tell Waldo the outcome you want, such as "make a blue circle" or complete a work task. Waldo interprets the goal and its context, creates a contract, assigns parts of the work to suitable agents and tools under permissions you control, and coordinates the process. It then reports completed work, unresolved items, and decisions that require your judgment. Kennel can be used on Mac to manage multiple agent sessions and their outcomes.
$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.
Free
Free to use and open source for managing multiple agent sessions and their outcomes; no specific usage quota is provided.
HumanLayer is the one with 89.3K monthly visits and 00:00:34 Avg.visit duration. HumanLayer has a Page per visit of 1.77 and a bounce rate of 47.10%.
| Monthly Visits | 89.3K |
| Avg·visit Duration | 00:00:34 |
| Page per Visit | 1.77 |
| Bounce Rate | 47.10% |
Waldo is the one with 1.7K monthly visits and 00:00:00 Avg.visit duration. Waldo has a Page per visit of 1.08 and a bounce rate of 33.06%.
| Monthly Visits | 1.7K |
| Avg·visit Duration | 00:00:00 |
| Page per Visit | 1.08 |
| Bounce Rate | 33.06% |
The top 5 countries/regions for HumanLayer are:United States 21.98%, Germany 6.90%, India 4.43%, Indonesia 3.45%, Australia 3.39%
![]() | 21.98% |
| 6.90% | |
| 4.43% | |
| 3.45% | |
![]() | 3.39% |
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The 6 main sources of traffic to HumanLayer are:vs_sourcesSearchOrganic 38.85%, Direct 33.71%, Referrals 18.96%, vs_sourcesSocialOrganic 6.75%, vs_sourcesGenAi 1.58%, Mail 0.15%, vs_sourcesAffiliate 0.00%, vs_sourcesDisplayAds 0.00%, vs_sourcesSearchPaid 0.00%, vs_sourcesSocialPaid 0.00%
vs_sourcesSearchOrganic | 38.85% |
Direct | 33.71% |
Referrals | 18.96% |
vs_sourcesSocialOrganic | 6.75% |
vs_sourcesGenAi | 1.58% |
Mail | 0.15% |
vs_sourcesAffiliate | 0.00% |
vs_sourcesDisplayAds | 0.00% |
vs_sourcesSearchPaid | 0.00% |
vs_sourcesSocialPaid | 0.00% |
The 6 main sources of traffic to Waldo are:Direct 34.49%, vs_sourcesSearchOrganic 33.35%, Referrals 11.54%, vs_sourcesSocialOrganic 5.47%, vs_sourcesDisplayAds 4.63%, Mail 3.73%, vs_sourcesAffiliate 2.43%, vs_sourcesGenAi 1.94%, vs_sourcesSearchPaid 1.53%, vs_sourcesSocialPaid 0.90%
Direct | 34.49% |
vs_sourcesSearchOrganic | 33.35% |
Referrals | 11.54% |
vs_sourcesSocialOrganic | 5.47% |
vs_sourcesDisplayAds | 4.63% |
Mail | 3.73% |
vs_sourcesAffiliate | 2.43% |
vs_sourcesGenAi | 1.94% |
vs_sourcesSearchPaid | 1.53% |
vs_sourcesSocialPaid | 0.90% |
HumanLayer might be a bit more popular than Waldo.As you can see, HumanLayer has 89.3K monthly visits, while Waldo has 1.7K 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 00:00:34, while Waldo has an Avg.visit duration of 00:00:00. Also, HumanLayer has a page per visit of 1.77 and a Bounce Rate of 47.10%. Waldo has a page per visit of 1.08 and a Bounce Rate of 33.06%.
The main users of HumanLayer are United States, Germany, India, Indonesia, Australia, with the following distribution: 21.98%, 6.90%, 4.43%, 3.45%, 3.39%.