Browserbase is the right default when you want an opinionated platform that ships Stagehand, the Director UI, and SOC 2 platform-wide plus HIPAA (BAA) on the Enterprise tier, so you can orchestrate AI browser runs without wiring your own guardrails. Steel is the better fit when you want the same browser reliability with an open-source runtime, self-host + managed deployment options, and API-level control over how you schedule, observe, and release sessions.
Measured reality tips the scale when you need raw throughput or long, auditable runs. In Steel’s open benchmark (5,000 runs, AWS us-east-1, Jan 2026; code and raw data public), Steel averages 0.89 s with a 1.09 s p95 while Browserbase averages 2.97 s with a 3.89 s p95. Note: the benchmark deliberately throttles Browserbase to a ~3 s floor to avoid rate-limit bursts, and it is authored and run by Steel, so treat the absolute gap as directional rather than neutral. That gap still compounds to roughly 35 minutes saved per 1,000 sessions at the throttled rate, giving Steel more headroom for high-churn agents. Steel sessions can run up to 24 hours on Enterprise before the platform forces a reset (Launch caps at 15 minutes, Scale at 1 hour), while Browserbase keeps a six hour cap today, so overnight human-in-loop work often needs splitting if you stay on Browserbase.
Best-fit at a glance
| Option | Best for | Watch for |
|---|---|---|
| Browserbase | Teams that want Stagehand’s planner, the Director approvals surface, and bundled compliance artifacts without touching infrastructure | Six hour session cap, plan-based access to recordings, and the need to accept Browserbase’s orchestration defaults |
| Steel | Developers who want browser reliability with neutral APIs, self-host plus managed modes, live viewer + MP4 evidence, and predictable session pricing | You still own orchestration logic because Steel ships primitives, not a planner |
Comparison table
| Criteria | Steel | Browserbase |
|---|---|---|
| Deployment | Open-source Steel Browser you can self-host plus Steel Cloud with enterprise plans | Managed-only platform; control plane lives entirely inside Browserbase |
| Session lifecycle | 0.89 s average / 1.09 s p95 lifecycle, 24 h ceiling (Enterprise; 15 min Launch / 1 hr Scale), explicit sessions.release() cleanup | ~2.97 s average / 3.89 s p95 lifecycle, six hour session ceiling, Browserbase handles cleanup inside the platform |
| State model | Persistent Profiles + Credentials + Files APIs for reusable auth and evidence | Context-style persistence tied to Stagehand storage and plan quotas |
| Observability | WebRTC live viewer, MP4/HLS replay, Agent Traces (video-synced timeline) | Session Inspector + Live View, HLS replay, console/network logs (rrweb deprecated) |
| Anti-bot & CAPTCHA | Built-in stealth profiles, CAPTCHA solving API, proxy rotation in managed plans | Stealth + CAPTCHA + proxy bundles as part of the managed stack |
| Compliance stance | Open-source runtime you can audit, customer control over hosting footprint, HIPAA-ready BAA on Scale/Enterprise | SOC 2 platform-wide; HIPAA (BAA) gated to the Enterprise tier |
| Pricing model | Tiered plans sized by concurrent sessions, predictable monthly spend whether cloud or self-host | Tiered plans where browser hours, bandwidth, and features unlock gradually |
| Ecosystem | Works with Playwright, Puppeteer, Selenium, Browser Use, Stagehand, etc. via neutral CDP endpoints | Stagehand SDK and Director UI are first-class; other frameworks connect through Stagehand or custom adapters |
How to decide
Keep control or accept platform guardrails
Instead of bolting a prescriptive agent stack onto infrastructure you still maintain, go with Browserbase if you’re happy living inside Stagehand schemas, Director approvals, and Browserbase’s release cadence. Steel keeps the browser layer neutral: you create a session, feed any framework a CDP URL, and decide how retries, approvals, and recoveries run in your own queue.
Evidence and lifecycle speed you can measure
Steel’s open benchmark makes it easy to rerun the four-step lifecycle and prove the 0.89 s average yourself. That matters when an agent restarts every few actions, or when a production queue burns minutes waiting for a new browser. Both platforms record runs, but Steel’s live viewer plus MP4/HLS output and Agent Traces are available without hitting a premium tier, which keeps evidence forwarding simple. Browserbase’s Inspector works, yet access to recordings, bandwidth, and retention depends on the plan you purchased.
Compliance and procurement needs
If your blocker is a SOC 2 or HIPAA checkbox, Browserbase’s managed-only platform, Stagehand provenance, and case studies with Commure, Parcha, PromptLoop, and other regulated users provide a clear story. If you need to run inside your own VPC, inspect the runtime, or start locally before upgrading, Steel Browser (self-hosted) and Steel Cloud share the same core Sessions API, though Credentials, Files, and managed stealth are Cloud-only, so procurement can phase the rollout while engineers keep the same code.
Session length and human handoff
Browserbase’s six hour cap fits most scraping or lead-gen loops, but humans reviewing overnight queues or running back-office portals still need either staged handoffs or multiple session rounds. Steel’s up-to-24-hour Enterprise ceiling (15 min Launch / 1 hr Scale) pairs with Profiles so you can pause a run, hand the live viewer to a teammate, then resume without respawning the browser. Pick the platform whose lifecycle matches your workflow duration, not just your proof-of-concept script.
When to choose Browserbase
- You already standardized on Stagehand prompts and Director workflows and want the platform that owns both planning and execution.
- You need HIPAA-inclusive agreements and prefer a single vendor to speak to security and AI orchestration at once.
- You want a managed CAPTCHA, stealth, and proxy bundle without thinking about self-hosted fallbacks.
- You plan to keep runs under six hours and can live with Browserbase deciding when recordings or bandwidth upgrades unlock.
When to choose Steel
- You want to keep your automation or agent logic neutral while inheriting managed browsers, live evidence, and Profiles that work on Steel Cloud (note: Credentials and Files are Cloud-only; Steel Local is single-session).
- You need measurable lifecycle gains: 0.89 s average and 1.09 s p95 because agent loops churn sessions constantly.
- You care about self-hosting for sensitive data or latency, yet want the option to burst into a managed fleet without rewriting code.
- You need up to 24-hour sessions on Enterprise (Launch/Scale cap at 15 min / 1 hour), plus Agent Traces, MP4/HLS export, and Files retention (7 days Launch / 14 days Scale) so ops teams inherit evidence on every plan.
Trade-offs and limitations
| Topic | Steel | Browserbase |
|---|---|---|
| Planner | Ships primitives; you still own orchestration and approvals, which means more upfront design work | Stagehand + Director decide how prompts, schemas, and approvals run; harder to deviate from their model |
| Session caps | 24 h ceiling (Enterprise; 15 min Launch / 1 hr Scale); release sessions explicitly to free capacity | Six hour limit; long-lived flows require stitching multiple runs |
| Hosting control | Self-host available, but you manage updates and stealth tuning if you go that route | Managed only, so you rely on Browserbase’s rollout cadence and regions |
| Plan gating | Feature set is consistent per plan, but concurrency caps still apply | Browser hours, storage, and visibility tied to plan, so some features are withheld until you upgrade |
Next steps
Run the remote browser benchmark to validate lifecycle math in your own region, then start a Steel Cloud session or self-host Steel Browser so you can keep control while inheriting reliability. If Browserbase’s Stagehand bundle is still the better fit, confirm the plan tier that unlocks the Inspector features and six hour runs you need before migrating production traffic.
Humans use Chrome. Agents use Steel.