How do their growth rates compare?

HumanLayer has a month-over-month growth rate of -33.4%; PromptLayer has -4.6%.

How does pricing compare?

HumanLayer: Freemium. Freemium with a free trial and paid team tiers; the CLI is installable via Homebrew and the core workflow can be tried before committing to a plan. PromptLayer: Free Trial, Contact for Pricing. PromptLayer has a free tier and three paid tiers. Free is $0/month with 5 users, 2.5k requests per month, 1 workspace, 250 eval cell executions and 10MB datasets. Pro is $49/month and adds unlimited playgrounds, unlimited workspaces and 150MB datasets. Team is $500/month with 25 users, 100k+ requests, 7.5k+ eval cell executions and 1GB datasets. Enterprise offers custom limits plus RBAC, deployment approvals, HIPAA with BAA, self-hosted or EU hosting and dedicated support. Overage is billed per transaction (about $0.003 on Pro, $0.002 on Team).

What are alternatives to HumanLayer and PromptLayer?

Other tools in related categories include Cursor, Google Antigravity, Command Code, T3 Code, Dify.

HumanLayer vs PromptLayer — Traffic (63.87K vs 85.9K), Pricing & Verdict

Open AI Tools

HumanLayer vs PromptLayer — Traffic (63.87K vs 85.9K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	HumanLayer	PromptLayer
Official Domain	humanlayer.dev	promptlayer.com
Pricing Model	Freemium	Free Trial, Contact for Pricing
Monthly Visits	63.87K (63,865)	85.9K (85,899)
MoM Traffic Delta	-31.99K (-33.4%)	-4.18K (-4.6%)
Primary Market & Share	🇺🇸 United States (28.6%)	🇺🇸 United States (10.9%)
Direct Visits / mo	20.49K	14.09K
User Rating	4.5	4.5
Supported Platforms	Website	Website

HumanLayer

A multiplayer control plane for AI coding agents

Multiplayer Tasks

Bundle agent sessions, artifacts, and worktrees into a shared Task that your whole team can open, comment on, and collaborate around.

QRSPI structured workflow

Six phases from clarifying Questions through Research, Design, Structure, and Plan to Implement, each with checkpoints your team can verify before more code is generated.

Comment-driven design review

Inline comments on versioned design docs let humans and agents negotiate the approach in real time, catching architectural mistakes before implementation.

Local and cloud daemons

A local daemon runs many sessions in parallel on your laptop, while cloud daemons handle long-running background work that survives closing your machine.

Strengths & Pros

+Structured QRSPI workflow keeps engineers in control instead of outsourcing thinking to agents
+Design docs and comments feed directly back into agent context, so decisions actually reach the code
+Runs locally or in the cloud with consistent UI across web, desktop, and phone
+Composable by design: bring your own model harness, compute, and dev environment