Best of 2026 · Give your agents browsers, memory, tools and monitoring · Prices checked October 21, 2026 to October 26, 2026
Best AI agent infrastructure agents in 2026
6 AI agent infrastructure agents for the job "give your agents browsers, memory, tools and monitoring", each with its pricing as the vendor publishes it ("not published" where it doesn't), the source and the date we checked it. 6 publish prices, 6 have a free plan. Ordered by our data, never by payment.
Compare prices AI agent infrastructure for developers Get price changes by email
Short answer: what AI agent infrastructure agents cost
6 of the 6 publish prices. The lowest listed monthly plan is $20/mo (AgentMail). Prices checked October 21, 2026 to October 26, 2026; the table on this page has every plan and its source. AgentMail, Browserbase, Notte, Browserless, Kernel and Steel have a free plan or free tier, according to their public pricing pages (checked October 21, 2026 to October 26, 2026).
All 6, in our order
Category page →-
Agent infrastructureFree tier
AgentMail
Email inboxes built for AI agents to send, receive and act on email through an API.
SubscriptionFree; Developer $20/mo
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Agent infrastructureFree tier
Browserbase
Cloud browsers that AI agents can control, for web automation and browsing tasks at scale.
SubscriptionFree; Developer $20/mo
-
Browser agentsFree tier
Notte
Browser framework and cloud for AI agents that handles sessions, captchas and web actions for developers.
Pay per useFree ($10 credits); Developer $20/mo
-
Browser agentsFree tier
Browserless
Hosted headless browsers that agents connect to over MCP, Puppeteer or Playwright, with stealth and captcha handling.
SubscriptionFree; Prototyping $25/mo (billed yearly)
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Browser agentsFree tier
Kernel
Cloud browsers for AI agents and automations, with fast startup, reusable logged-in sessions and anti-bot handling.
SubscriptionFree; Hobbyist $30/mo + usage
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Browser agentsFree tier
Steel
Open-source browser API for running fleets of cloud browsers for AI agents.
SubscriptionFree; Scale $250/mo + usage
How we ordered this list: whether the vendor publishes its prices, then the number of verified public use cases we've found, then the lowest listed monthly plan. Only full listings (verified starting price with its source) are included. We haven't tested these hands-on. How we rank.
Pricing compared
| Agent | Starts at | Model | Free plan | Plans | Checked | Source |
|---|---|---|---|---|---|---|
| AgentMail | Free; Developer $20/mo | Subscription | Yes |
| October 21, 2026 | Source |
| Browserbase | Free; Developer $20/mo | Subscription | Yes |
| October 21, 2026 | Source |
| Notte | Free ($10 credits); Developer $20/mo | Pay per use | Yes |
| October 26, 2026 | Source |
| Browserless | Free; Prototyping $25/mo (billed yearly) | Subscription | Yes |
| October 25, 2026 | Source |
| Kernel | Free; Hobbyist $30/mo + usage | Subscription | Yes |
| October 25, 2026 | Source |
| Steel | Free; Scale $250/mo + usage | Subscription | Yes |
| October 25, 2026 | Source |
Download this table as a CSV (free, CC BY 4.0: product, starting price, pricing model, free plan, every listed plan, checked date, vendor pricing page).
Prices are copied from each vendor's public pricing page on the date shown. "not published" or "Contact sales" means the vendor doesn't publish a price; we don't guess. Prices change; confirm with the vendor.
FAQ
What are the best AI agent infrastructure agents in 2026?
We list 6 AI agent infrastructure agents as full listings, with pricing checked on each vendor's own site. Ordered by our data (whether the vendor publishes its prices, then the number of verified public use cases we've found, then the lowest listed monthly plan), the first three are AgentMail (Free; Developer $20/mo), Browserbase (Free; Developer $20/mo) and Notte (Free ($10 credits); Developer $20/mo). We haven't tested them hands-on, and no vendor can pay to change this order.
How much do AI agent infrastructure agents cost?
6 of the 6 publish prices. The lowest listed monthly plan is $20/mo (AgentMail). Prices checked October 21, 2026 to October 26, 2026; the table on this page has every plan and its source.
Which AI agent infrastructure agents have a free plan?
AgentMail, Browserbase, Notte, Browserless, Kernel and Steel have a free plan or free tier, according to their public pricing pages (checked October 21, 2026 to October 26, 2026).
Did AITeamGuide test these products?
Not yet. This page is built from public pricing pages (with the date we checked each one), published product information and credited public use cases. Hands-on tests will be marked when we add them.
Can a vendor pay to rank higher here?
No. The order comes from our data only. Paid placements are always labelled "Sponsored" or "Featured", sit outside the list and never change the order.
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Work at a company on this page? Vendors can claim their listing for free or feature it with a label that says "Sponsored"; paid status never changes the order on this page. Building a different agent? List it here.
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