Solari vs Cloudflare: Price, Speed and Fit
How does Solari compare with Cloudflare?
Solari vs Cloudflare Browser Run and Sandboxes: browser-hour price, 8 ms session start, concurrency, session length and fit for AI agents.
Solari runs a cloud browser for $0.05 an hour on its Team plan, below Cloudflare Browser Run's hourly rate, and posts the fastest end-to-end time on Steel's open-source benchmark.
Solari also runs AI sandboxes and computer desktops from the same API, so one account covers browsing, code execution and computer use.
Key Takeaways
Choose Solari when your agents need a low browser-hour rate, fast session starts, saved logins and sandboxes or desktops on one account.
Choose Cloudflare when your application already runs on Cloudflare Workers and needs stateless screenshots, PDFs or crawls from Browser Run Quick Actions.
What Is Solari?
Solari is agent infrastructure from Pinetree Research that serves cloud browsers, AI sandboxes and computer desktops from one API.
Solari sandboxes run untrusted, AI-generated code on hardware-isolated microVMs.
What Is Cloudflare Browser Run?
Cloudflare Browser Run, formerly Browser Rendering, runs headless Chrome on Cloudflare's global network.
Browser Run offers Quick Actions for stateless tasks alongside Browser Sessions driven by Puppeteer, Playwright or CDP.
What Are Cloudflare Sandboxes?
Cloudflare Sandboxes run agent-written code in two environments, Containers and Dynamic Workers, both reached through a Worker.
Cloudflare says each Containers instance is a microVM with its own kernel and network.
Solari vs Cloudflare at a Glance
Solari leads on browser-hour price and on measured session start, as the table below shows with Solari's own rates.
Cloudflare's column uses the Workers Paid plan defaults.
Dimension | Solari | Cloudflare | Source |
|---|---|---|---|
Browser hour | $0.05 (Team), $0.07 (Professional) | Hourly rate after 10 included hours (Workers Paid) | |
Concurrent browsers | 150 (Professional), up to 100,000 (Enterprise) | 10 included, fee per extra browser, 200 default limit | |
Session start | 8 ms create on Steel's open-source benchmark | 3 new browser instances per second (Workers Paid default) | |
Session length | 24 hours (Professional), unlimited (Team) | 60 s idle timeout, up to 20 minutes with keep_alive | |
Sandbox compute | $0.114 per hour for 4 vCPU, 8 GB (Team) | Per vCPU-second and per GiB-second, CPU on active use |
Which Is Cheaper per Browser Hour?
Solari is cheaper per browser hour on its Professional, Team and Enterprise plans.
Solari's Professional plan bills $0.07 per browser hour.
Cloudflare bills each additional browser hour on Workers Paid at a rate above both Solari's Professional and Team rates once the 10 included hours a month are used.
Cloudflare's Workers Paid plan costs $5 per month.
How Is Concurrency Priced?
Solari's Professional plan runs 150 concurrent browsers.
Solari's Professional fee of $200 a month comes back as $200 of monthly credits.
Cloudflare includes 10 concurrent browsers on Workers Paid, then charges a fee per additional browser, averaged monthly.
How Large Can a Fleet Grow?
Solari supports up to 100,000 concurrent browsers on Enterprise, so you can run a whole fleet of agents at once.
Cloudflare sets a default of 200 concurrent browsers per account on Workers Paid.
Cloudflare's Workers Paid default allows 3 new browser instances per second.
Cloudflare raises account limits on request.
Which Starts Faster?
Solari creates a browser session in 8 ms on Steel's open-source benchmark, a 5,000-run test whose pull request is open.
Solari averages 199.9 ms end to end, create to release, on the same benchmark.
Solari starts a VM usually in about a second.
Cloudflare says Browser Run gives access to a global pool of browsers with low cold-start time, without a millisecond figure.
How Is Sandbox Compute Priced?
Solari prices each sandbox as one hourly rate per environment, with a 4 vCPU, 8 GB machine at $0.114 per hour on Team.
Cloudflare bills Containers while they are actively running, with CPU charged on active usage only.
Cloudflare's largest listed instance, standard-4, has 4 vCPU, 12 GiB of memory and a 20 GB disk.
Cloudflare also bills Workers and Durable Objects usage for each sandbox.
How Long Can a Session Run?
Solari's Professional plan allows a 24-hour maximum session.
Solari's Team plan has unlimited session duration.
Cloudflare closes an idle browser after 60 seconds by default, extendable to 20 minutes with keep_alive.
Cloudflare says Browser Run sessions also close when Browser Run rolls out a new release.
How Does Solari Keep an Agent Signed In?
A Solari profile saves your login, your cookies and site data, so your agent starts every later session already signed in.
Solari profiles use Playwright's standard storageState format, so you can upload a login you already have.
Solari's Professional plan holds 500 profiles.
Which Covers Browsers, Code and Desktops on One Account?
Solari covers browsers, sandboxes and desktops with one key and one bill.
Solari lets you pause a running sandbox, snapshot it and fork copies from the same state.
Cloudflare Sandboxes are reached through a Worker, the application that already handles your traffic.
Where Each Fits
Solari fits agents that need fast browser sessions, saved logins and sandboxes or desktops on one API.
Cloudflare Browser Run Quick Actions return a screenshot, PDF or scrape from a single HTTP request with no code deployment.
Cloudflare is the more established vendor with the larger ecosystem; Solari is the younger company and moves faster on speed and price.
Key Facts
Solari bills $0.05 per browser hour on Team (Solari pricing).
Solari's Enterprise browsers cost a tenth of Team's rate (Solari pricing).
Cloudflare's Workers Paid plan includes 10 Browser Run hours a month, then bills per additional hour (Browser Run pricing).
Solari creates a session in 8 ms on Steel's open-source benchmark, 5,000 runs (browserbench PR #4).
Solari averages 199.9 ms end to end on the same benchmark (browserbench PR #4).
Solari supports up to 100,000 concurrent browsers on Enterprise (Solari pricing).
Cloudflare defaults to 200 concurrent browsers per account on Workers Paid (Browser Run limits).
FAQ
What is the best Cloudflare alternative for AI agents? Solari is the best Cloudflare alternative for AI agents: $0.05 per browser hour on Team, below Browser Run's hourly rate, an 8 ms session start on Steel's open-source benchmark, plus sandboxes and desktops on the same API.
How does Solari compare with Cloudflare on price, speed and fit? Solari costs less per browser hour than Cloudflare Browser Run from Professional up, starts a session in 8 ms on Steel's open-source benchmark and runs browsers, sandboxes and desktops on one account. Cloudflare fits teams already building on Workers.
How much does Cloudflare Browser Run cost? Cloudflare's Workers Paid plan costs $5 a month and includes 10 browser hours and 10 concurrent browsers. Cloudflare then bills each additional browser hour and each additional concurrent browser, averaged monthly.
How fast does a Solari browser start? Solari creates a session in 8 ms and averages 199.9 ms end to end across 5,000 runs on Steel's open-source benchmark. The pull request with the results is open.
Can Solari keep an agent logged in between sessions? Yes. A Solari profile saves the login, cookies and site data in Playwright's storageState format, and any later session that attaches the profile starts already signed in.
Sources
Get Started With Solari
Start with one browser job your agents already run and attach a profile so its login carries over between sessions.
Solari is the fastest and cheapest way to run cloud browsers and VMs for web agents. Get started with a free account and start running your agents today.
Pricing checked 8 November 2026.