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Val Town

Deno isolates that run TypeScript on HTTP, cron and email triggers.

val.towndocs.val.town
Overall in sandbox providers
18of 19 · score 43.7
Data coverage
96%
25 of 26 fields sourced

Best for

  • •Evaluating short TypeScript snippets behind an HTTP endpoint
  • •Cron and webhook glue an agent can write and deploy itself
  • •Zero infrastructure, and you can accept zero filesystem

Strong on

  • +Idle cost free-when-stopped 1/19
  • +MCP server Yes 1/18
  • +SDKs typescript, rest-api, cli 2/19
  • +Cold start 150ms 2/16
  • +Cold start (claimed) 100ms 3/12

Weak on

  • −Snapshot & fork No 16/19
    Better: Daytona: Yes
  • −Custom images No 17/19
    Better: E2B: Yes
  • −Persistent FS No 17/19
    Better: Modal: Yes
  • −Max runtime 5min 17/18
    Better: E2B: 24h

vs Freestyle

  • •Ahead on MCP server: Yes vs Partial
  • •Ahead on SDKs: typescript, rest-api, cli vs typescript, rest-api
  • •Behind on Persistent FS: No vs Yes
  • •Behind on Isolation: v8-isolate vs microvm

How Val Town scores among 19 sandbox providers25 of 26 fields known

Runtime13

Cold start2nd
150ms
2/16
Leader: Riza · 120ms
Cold start (claimed)3rd
100ms
3/12
Leader: Blaxel · 25ms
docs.val.town · 2026-11-07
Max runtime
5min
17/18
Leader: E2B · 24h
Persistent FS
No
17/19
Leader: Modal · Yes
docs.val.town · 2026-01-15
Snapshot & fork
No
16/19
Leader: Daytona · Yes
Custom images
No
17/19
Leader: E2B · Yes
docs.val.town · 2026-01-15
GPU
No
6/15
Leader: Modal · Yes
Runtimes
javascript-typescript
11/18
Leader: boat · python, javascript-typescript, bash, go, rust, java, ruby, php, any-oci-image
Preview URLs1st
Yes
1/19
docs.val.town · 2026-01-15
Browser inside
No
15/18
Leader: E2B · Yes
File up/download
Partial
11/19
Leader: E2B · Yes
Sydney region
No
8/18
Leader: Fly.io Machines · Yes
Concurrent limit
N/A
val.town · 2026-11-07

Isolation & network3

Isolation
v8-isolate
16/19
Leader: E2B · microvm
docs.val.town · 2026-01-15
Root in guest
No
18/19
Leader: E2B · Yes
docs.val.town · 2026-01-15
Egress control
proxy-logged
12/19
Leader: Daytona · allowlist

Agent integration3

MCP server1st
Yes
1/18
SDKs2nd
typescript, rest-api, cli
2/19
Leader: Runloop · python, typescript, rest-api, cli
Streaming output
Partial
13/17
Leader: E2B · Yes

Pricing3

Price / hour
—
Meter
subscription
16/19
Leader: Cloudflare Sandbox · per-10ms
val.town · 2026-01-15
Idle cost1st
free-when-stopped
1/19

Traction2

GitHub stars
144
6/7
Leader: Daytona · 71,000
github.com · 2026-11-07
Funding
seed
9/15
Leader: Fly.io Machines · series-c-plus

Positioning1

Positioning
Write and deploy TypeScript in the browser, triggered by HTTP, cron or email.

Timeline1

Shipped
2022
12/16
Leader: Daytona · 2025

Alternatives8

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Sources5

Val Town logo & brand colours

Logo assets

LogoSVG
Download
MonochromeSVG
Val Town logo

Flattened to currentColor, what Toolweight renders in tables and nav.

Download

Val Town brand colours

#FFFFFF
#000000