How is a session charged?

A running session is charged an hour ahead. When it stops, the unused part of its last hour is given back.

What happens to credits I do not use?

Plan credits renew at the start of each period and expire if unused. Usage credits do not expire.

How do I buy usage credits?

Usage credits are bought on top of any plan at €1 a credit, in packs of ₡5, ₡10, ₡25 and ₡50. Buy them on the account page or with machine account buy-usage.

Fact sheet · Developer Tools

TestFlows Machine

Run your programs deterministically. Record, replay, and branch your runs.

0 votes. Log in to vote for TestFlows Machine in the file community vote²Follow the file. Log in to follow TestFlows Machine's file Not yet verified by the maker

A platform to capture, replay, and branch program runs with full determinism, checkpoint and fork points, and built-in debugging.

Overview

Screenshot of the TestFlows Machine homepage — What testflows.com looks like

TestFlows Machine lets you record program runs with every non-deterministic input pinned down, then replay them instruction-by-instruction to achieve identical state and outcomes. You can checkpoint at any point, fork to try alternatives without losing the original timeline, and inject faults into disk, network, clock, containers and system calls to test robustness. The platform includes a debugger for programs running in the machine, supports the machine client and Python SDK, and stores runs and disk images in the cloud. Sessions are charged by vCPU-hours, with plans ranging from free to dedicated machines for teams.

Feature facts

Record runs with non-deterministic inputs pinned down
Replay runs instruction-by-instruction
Checkpoint and fork from any point
Fault injection for disk, network, clock, containers and system calls
Built-in debugger for machine programs
Machine client and Python SDK
Cloud storage for runs and disk images
Multiple simultaneous sessions with configurable vCPUs
Configurable session disk up to 256G

Pricing

Pricing model: Freemium

Free: €0 with ₡3 credits included each month (about 20 vCPU-hours). Starter: €10/month with ₡25 credits (about 166 vCPU-hours). Plus: €25/month with ₡65 credits (about 433 vCPU-hours). Pro: €50/month with ₡150 credits (about 1,000 vCPU-hours). Dedicated: contact sales. Usage credits: €1 a credit, pu

Follow the file. Log in to follow TestFlows Machine's file

Follow TestFlows Machine: their milestones, new launches and awards come to you by email, once a day by default.

TestFlows Machine specifications

Specifications of TestFlows Machine
Section	Developer Tools
Website	testflows.com
Votes²	0

TestFlows Machine metrics

Fact file for testflows.com: Ahrefs Domain Rating and Majestic link facts, each with the change since the last fact check.
Metric	Value
Domain Rating	2 no change since last check
Trust Flow	4 no change since last check
Citation Flow	21 no change since last check
Referring domains	27 no change since last check
External backlinks	199 no change since last check

Fact: Ahrefs Domain Rating checked 12 Nov 2026, fact changed 10 Nov 2026. Fact: top topic Computers/Open Source (4). Fact: Majestic checked 9 Nov 2026, fact changed 9 Nov 2026. Link facts from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

TestFlows Machine domain fact sheet

Open the fact sheet

Read from the public RDAP record on 12 Nov 2026, 08:15 UTC.
Domain age	7 years
Registered	5 Dec 2018
Expires	5 Dec 2027
Registrar	GoDaddy.com, LLC
DNSSEC	Not signed

Every domain fact for testflows.com

TestFlows Machine launch receipt sheet

What we have measured for TestFlows Machine since it went live on SaaS Directory Info on 9 November 2026.

2 Domain Rating (Ahrefs) no change since launch
at launch: 2 (10 Nov 2026); latest: 12 Nov 2026
4 Trust Flow (Majestic)
first measured 9 Nov 2026
27 Referring domains (Majestic)
first measured 9 Nov 2026

Day 2 since launch. Next receipt: day 30, 9 Dec 2026. The figures report a change; they do not say what caused it, and many things can. No figure here is a guess.

Biggest gains on SaaS Directory Info

Got a launch coming up?

Step-by-step tips for before, during and after your launch, free to read on SaaS Directory Info.

Prepare
Launch day
Launch week
Next steps

Read the launch playbook

Compare and explore

Frequently looked up

Q1How is a session charged?: A running session is charged an hour ahead. When it stops, the unused part of its last hour is given back.
Q2What happens to credits I do not use?: Plan credits renew at the start of each period and expire if unused. Usage credits do not expire.
Q3How do I buy usage credits?: Usage credits are bought on top of any plan at €1 a credit, in packs of ₡5, ₡10, ₡25 and ₡50. Buy them on the account page or with machine account buy-usage.

Leave a review for TestFlows Machine

Review count for TestFlows Machine: none yet. Add the first.

Fact: reviews are free and cannot be bought. All reviews, in brief

Reviews and facts · Fact updates · Share these facts · Your SaaS? Claim this fact file · Report a wrong fact

Product	Origin	DR¹	Votes²
liquid-technologiesXML code generator for C# and Visual Basic .Net that creates strongly typed object models from XML schemas	United Kingdom	70	0 votes. Log in to vote for liquid-technologies in the file
APIGitGit-native platform for building, publishing, sharing, and securing APIs	United States	36	0 votes. Log in to vote for APIGit in the file
eryxWebAssembly sandbox for running untrusted Python safely	not stated	0	0 votes. Log in to vote for eryx in the file
Claude Code Status Line BuilderFree browser tool to build Claude Code status line configuration	not stated	2	0 votes. Log in to vote for Claude Code Status Line Builder in the file