Terms of use
This page covers the rules for using fastcrest.com, docs.fastcrest.com, the Reflex software (reflex-vla on PyPI), the Cloudflare Worker at chat.fastcrest.com, and the GitHub repos under FastCrest. Plain English; no boilerplate.
Who we are
Section titled “Who we are”FastCrest is a sole-proprietor operation run by Romir Jain in San Francisco, California. “We” / “us” in this document means FastCrest. Reach us at hello@fastcrest.com.
What’s licensed how
Section titled “What’s licensed how”| Asset | License | Where it lives |
|---|---|---|
The Reflex software (reflex-vla on PyPI) | BSL 1.1 — auto-converts to Apache 2.0 in 2030 | github.com/FastCrest/reflex-vla |
| The fastcrest.com landing source | Internal, not yet open-sourced | private repo |
| The docs.fastcrest.com source | Internal, not yet open-sourced | private repo |
| The chat proxy worker | Internal, not yet open-sourced | private repo |
| Documentation content (this page, every other docs page) | Free to read; please attribute when quoting; don’t republish wholesale without asking | docs.fastcrest.com |
The site source going public is a planned event, not a commitment with a date.
Acceptable use
Section titled “Acceptable use”You can:
- Read every page on docs.fastcrest.com and fastcrest.com
- Download Reflex from PyPI and use it in personal, academic, or commercial projects under BSL 1.1
- Quote, link to, or reference docs content with attribution
- Subscribe to the newsletter and unsubscribe at any time
- Use
reflex chatup to 100 calls/day per machine on the free tier - File issues, open PRs, contribute to any of the open repos
You can’t:
- Run a competing hosted service offering Reflex itself as the product (BSL clause; auto-lifts in 2030)
- Hammer the Cloudflare Worker beyond what the rate limits allow
- Republish docs content wholesale without permission
- Misrepresent your relationship to FastCrest (claiming partnership, employment, etc., when none exists)
If you’re unsure whether your use case is OK, email us — most ambiguous cases land on the “yes, that’s fine” side.
Newsletter terms
Section titled “Newsletter terms”When you subscribe via the form on fastcrest.com:
- You’ll get at most one email per major release of Reflex (so v0.8, v0.9, etc.). No marketing drip, no upsells.
- Every email includes a one-click unsubscribe link.
- You can unsubscribe any time at
https://fastcrest.com/unsubscribe?t=<token>— the token is returned in your subscription response. - Your email isn’t shared with third parties. See privacy for what we store and how.
Reflex chat (chat.fastcrest.com/chat)
Section titled “Reflex chat (chat.fastcrest.com/chat)”The free tier is 100 calls/day per machine, no signup, no API key. We can change the rate limit, model, or pricing at any time, with reasonable notice via the newsletter and changelog.
For the OpenAI-side data policies governing what happens when your prompt is forwarded, see the third-parties section in privacy.
Pro tier
Section titled “Pro tier”The Pro tier (reflex serve --pro) requires a separate commercial license. Pricing and obligations are documented at pricing. Standard “best-effort, no warranty, no SLA on free use; SLA negotiable for Enterprise” language applies.
No warranty
Section titled “No warranty”The Reflex software, the docs, and the proxy services are all provided as is, without warranty of any kind. We try hard for the docs to be accurate and the software to work, but we can’t guarantee it will be defect-free or fit for any particular purpose. Use it on a real robot only after you’ve read the parity claims and run reflex doctor yourself.
This is the standard “the open-source community does its best, but at the end of the day you’re responsible for your own deployments” disclaimer that ships with every responsible OSS project.
Limitation of liability
Section titled “Limitation of liability”To the maximum extent permitted by applicable law, FastCrest is not liable for indirect, incidental, special, consequential, or punitive damages arising from use of the software or sites. If you operate a robot using Reflex and something goes wrong, the responsibility for what happens in physical space sits with you (and likely your robot’s safety controllers, your URDF limits, your insurance, etc.) — not with us.
Changes to these terms
Section titled “Changes to these terms”If these terms change, we update this page and timestamp it at the bottom. Material changes (anything that meaningfully restricts what you could do before) get announced in the changelog and the newsletter. The page is in git so the diff is auditable.
Governing law
Section titled “Governing law”California, USA. If a dispute somehow arises, we’d both rather sort it out by email than by court — please reach out to hello@fastcrest.com before any legal action.
Last updated: 2026-05-01.