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Pricing

5,000 standard requests for free.
You only pay when String returns content, no paying for blocks.

Starter
$20 / month
Usage billed per successful request. Credits roll over.
Per 1,000 successful requests

Fetch is a plain HTTP request; Browser renders the page in a real browser. Standard is the default proxy; premium adds residential routing, used only when a target needs it.

Fetch · standard proxy$0.30 / 1k
Fetch · premium proxy$3.00 / 1k
Browser · standard proxy$1.50 / 1k
Browser · premium proxy$6.00 / 1k
Browser WebSocket
Bandwidth$10.00 / GB
Duration$0.12 / hr
Throughput

Concurrency is not capped — run as many requests in parallel as you like. Throughput is governed by request rate instead, and the burst allowance absorbs spikes above it. Need a higher rate? Ask.

Concurrent requestsUnlimited
Request rate60 / sec
Burst allowance3,600 requests
Subscribe
Growth
Most popular
$100 / month
Usage billed per successful request. Credits roll over.
Per 1,000 successful requests

Fetch is a plain HTTP request; Browser renders the page in a real browser. Standard is the default proxy; premium adds residential routing, used only when a target needs it.

Fetch · standard proxy$0.20 / 1k
Fetch · premium proxy$2.00 / 1k
Browser · standard proxy$1.00 / 1k
Browser · premium proxy$4.00 / 1k
Browser WebSocket
Bandwidth$10.00 / GB
Duration$0.12 / hr
Throughput

Concurrency is not capped — run as many requests in parallel as you like. Throughput is governed by request rate instead, and the burst allowance absorbs spikes above it. Need a higher rate? Ask.

Concurrent requestsUnlimited
Request rate60 / sec
Burst allowance3,600 requests
Subscribe
Enterprise
Contact us
For high-volume & enterprise needs.
Custom rate cardVolume-based pricingUnlimited concurrency, custom request rateDedicated supportPriority service and incident resolution
Contact us

Frequently asked questions

Is there a free tier?

Yes. 5,000 standard requests for free. You don't buy credits up front, and requests aren't billed per GB.

What happens when a request is blocked?

You don't pay for it. Billing only counts the requests that come back with content.

How is usage billed?

Per successful request, at per-1,000 rates that vary by plan, fetch path, and proxy class. On Starter ($20/month): Fetch · standard proxy $0.30 / 1k, Fetch · premium proxy $3.00 / 1k, Browser · standard proxy $1.50 / 1k, Browser · premium proxy $6.00 / 1k. On Growth ($100/month): Fetch · standard proxy $0.20 / 1k, Fetch · premium proxy $2.00 / 1k, Browser · standard proxy $1.00 / 1k, Browser · premium proxy $4.00 / 1k. Fetch is a plain HTTP request; Browser renders the page in a real browser. Standard is the default proxy; premium adds residential routing, used only when a target needs it. Unused credits roll over.

How is the Browser WebSocket billed?

On bandwidth and duration rather than per request: $10.00 / GB and $0.12 / hr, the same on Starter and Growth.

Is there a concurrency limit?

No. String doesn't cap how many requests you run in parallel, on any plan. Throughput is governed by the request rate instead: 60 / sec with a burst allowance of 3,600 requests, the same on Starter and Growth. Sustained concurrency therefore works out to your request rate times your average response time. Enterprise raises the rate and keeps concurrency unlimited; email support@usestring.ai if you need more.

What does the Enterprise plan include?

A custom rate card, volume-based pricing, unlimited concurrency with a custom request rate, dedicated support, and priority service and incident resolution, sized for high-volume workloads. Priority service and incident resolution is Enterprise only; it is not included on Starter or Growth. Tell us what you're running and we'll scope it.

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