In 2026, companies stopped testing AI agents and started deploying them, and OpenAI now sells a platform to deploy agents as "AI coworkers". Most of those agents work on websites built for people, so the service that hands them a headless browser sits in the path of every task they run.
Solari and TinyFish both sell that browser from different starting points: TinyFish is a web stack built around outcomes (search, fetch, a goal-driven agent and page monitoring), and Solari is the infrastructure your own agent runs on, with cloud browsers, sandboxes and desktops from one API. Choose Solari when you run your own agent and need fast, cheap browsers at high concurrency plus a place to run code; choose TinyFish when you want a hosted agent that takes a goal in plain English and brings back the result. This comparison covers speed, price, the jobs each one fits and where web agents go next.
Solari vs TinyFish at a Glance
Why Does the Browser Vendor Matter More Now?
An agent that browses runs many short sessions, so its browser vendor sets the speed and cost of every task. A script used to run one long-lived browser, often on a team's own servers, and paid the start time once.
Agents run the other way. An agent opens a browser for a task, works a few pages, hands the result to code and closes it, then repeats that across hundreds of accounts in parallel. Start time, price per browser hour and the number of sessions you can run at once now decide what each run costs and how long a list takes.
The two vendors answer that differently. TinyFish folds the browser into a product that also runs the model; Solari gives your own agent the browser and leaves the model to you.
How Do Solari and TinyFish Compare on Speed?
Solari starts a browser before your agent notices the wait: Solari browsers are ready in 8 ms. On Steel's open-source benchmark, a Solari session averages 199.9 ms end to end, from create to release, across 5,000 runs. The results sit in an open pull request, so you can rerun them yourself.
TinyFish is not one of the vendors on that benchmark, so no like-for-like number exists between the two. TinyFish says creating a Browser API session takes seconds rather than milliseconds, and it asks you to set a long HTTP client timeout for the create call.
An agent that opens a clean browser for every task pays the start time on every task. With Solari that cost drops out of the run, so you can give each task, or each step, its own fresh browser.
How Do Solari and TinyFish Compare on Price?
Every paid Solari browser rate sits below TinyBrowser's list rate per browser hour. TinyFish's published rates are $0.002 per minute for TinyBrowser, which is $0.12 per browser hour at list with 5 concurrent sessions on pay as you go, $0.016 per step for TinyAgent with 2 concurrent runs, and $0.005 per check for TinyMonitor, with no plans and no monthly minimum.
Solari's browser hour runs from $0.15 down to $0.005 as your usage grows. Its first paid plan costs $20 a month and runs 20 concurrent browsers, so a small team starts with more parallel browsers than TinyBrowser's default.
TinyAgent is a different purchase. Its per-step price includes the model's inference, residential proxies and anti-bot handling, so you pay for an agent's actions rather than for a browser's time.
Proxies are where the two bills differ most. TinyFish routes every Browser API session through a residential proxy by default. On Solari, proxy traffic is billed per GB, from $4.00 to $6.00, and only for the sessions that need it; you can also block heavy video and images so they never cross the proxy.
Which Fits Your Agent?
TinyFish fits teams that want answers from the web without running an agent; Solari fits teams that run their own agent and need the environment under it. These are the jobs that usually decide it:
Your own agent on Playwright. Both vendors hand you a browser over the Chrome DevTools Protocol, so Playwright code connects to either one through its connection URL. Solari's per-hour rates and concurrency suit an agent that opens many browsers at once, and the start time stays out of every task.
A goal in plain English. TinyAgent takes a goal, works the live site and returns structured results, with the model included in the per-step price. If you would rather not run a model or an agent loop yourself, TinyFish handles both.
Search, fetch and monitoring. TinySearch and TinyFetch are free within their rate limits, and TinyMonitor watches a page on a schedule. If your agent mostly reads search results and page text, TinyFish covers that without opening a browser.
Logins that persist. TinyFish's direct Browser API sessions do not keep cookies or storage on their own, and saved logins run through its Browser Context Profiles for TinyAgent runs. On Solari, any session you create opens already signed in when you pass a profile id.
Code next to the browser. Many agents read a page, then run code on what they found. Solari gives you both on one account, so the browser and the machine that processes its output share one key and one bill.
What Role Does Solari Play?
Solari is the environment your agent works in; your agent brings the model and the logic. Solari was built for agent workloads that are short-lived and highly parallel.
A whole list in one pass. With Solari you can launch up to 100,000 browser sessions at once. Your agent works through every account, listing or form in a single run instead of in batches.
Logins that stay signed in. A Solari profile saves your login, cookies and site data in Playwright's storage state format. Your agent signs in once, every later session opens already signed in, and a storage state file you already have uploads as is.
Sites that block automation. Turn on stealth for sites with bot defenses such as Cloudflare or DataDome, and pick a residential, static ISP or mobile IP per session. Every other site runs on the faster default browser.
A record of every run. Record a session and replay it in the console, or download it as a line-by-line log. Recording captures input values by default, so leave it off for sessions that type passwords.
Solari sandboxes run the code your agent writes, with pause, resume, snapshot and fork, and Solari desktops give computer-use models a full Linux screen. All three share one account and one API, so a task can move from a browser to a machine without a second vendor.
What Comes Next for Web Agents?
Today most teams pick one web vendor and build around it. Over the next year that changes in four ways:
A fresh browser per step. As start time falls toward zero, agents will open a clean browser for each step instead of reusing one long session.
Your model, your choice. Teams will swap models as they improve, so infrastructure that leaves the model to you stays useful longer.
Browsers and machines together. One task will move between a browser, a sandbox and a desktop under one account.
Replays as the record. Approvals will point to the recording of what an agent did, not to its summary.
What stays human is judgment: which sites an agent may sign in to, what it may submit under your name, and which runs a person reviews before anything leaves.
Should You Choose Solari or TinyFish?
Choose Solari when you run your own agent and session speed, price per browser hour and concurrency decide what your pipeline costs, or when the same agent also needs to run code or operate a desktop. Stay with TinyFish when you want a hosted agent with the model included, free search and fetch, and monitoring in the same account. TinyFish is the more established vendor for hosted, goal-driven web agents; Solari is the younger company and moves faster on speed and price.
Get Started With Solari
Start with one agent: point its Playwright connection at a Solari session, run it next to the TinyFish version and compare the speed and the bill. 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.
