Terms of Service

1. These Terms

These Terms of Service cover two things: your use of the Castalin website at castalin.com, and the services Castalin provides to clients. By using the site, submitting a form, requesting a demo, or engaging us for work, you agree to them. If you do not agree, please do not use the site.

In these terms, “Castalin”, “we” and “us” mean David Perez, doing business as Castalin, operating from California. “You” means the person or company using this website or engaging us for work.

Nothing on this website is an offer to contract. Paid work begins when both sides sign a service agreement, and where that agreement conflicts with anything written here, the signed agreement governs.

2. What Castalin Does

Castalin sells Operations as a Service to home service and trade businesses. We map how work moves through a company from its real data, rank the gaps by what closing them is worth, then build and run the systems that close them.

We are not a software vendor and not a reseller. We sell no licenses and no seats, and nothing we build is rented back to you. That is a narrower claim than it sounds: we do build software, custom, and section 5 sets out that it becomes yours. Whether a tool you already run is kept and built around, or replaced by something built for you, is decided by what that tool can actually do and whether it can be connected to. Where it works and can be reached, it stays, and replacement is never the opening move. What any individual engagement covers, and what it does not, is defined in that engagement’s signed agreement rather than on this page.

3. Engagements, Scope and Payment

Services, deliverables, timelines and fees are set out in a service agreement signed by both parties. The commercial shape is the same in every engagement: the build is a project, it is priced as a project, and it is delivered in sprints, so working pieces reach your team as they are finished rather than everything landing at the end.

Once a system is live, the only recurring charge is maintenance and support. Work you decide you want after go-live is scoped and quoted as its own piece of work rather than absorbed into that charge. There is no per-seat license, no product you are renting from us, and no year-long commitment.

Amounts, invoicing schedule, and any refund terms are stated in the signed agreement, because they follow the scope and the scope differs from company to company.

Two guarantees are published on this site, and both are intended to be carried into the signed agreement. First, if the ranked roadmap does not show you something you did not already know, you do not pay for that phase. Second, any piece we build that is not moving the number it was built to move is switched off and leaves your maintenance charge. Neither of them is a refund of the whole build: the process map, the roadmap and every piece that is working remain yours. Where this page and a signed agreement differ, the signed agreement governs, as section 1 says.

4. What We Need From You

Delivery depends on things only the client can supply: access to the systems we are building on, one person with authority to make decisions, and answers within a reasonable time. Where access or a decision is delayed, the timeline moves with it. We are not responsible for outcomes that depend on data, systems, or approvals we were never given.

5. Ownership of What We Build

You own the system we build for you. Custom software, workflows, automations, dashboards and documentation produced for you under a signed agreement become your property on full payment, and they keep running whether or not you continue working with us. There is no license to renew and nothing to buy back.

Your data stays yours. Records, accounts and content inside the tools you already run remain in your name and under your control at all times.

Castalin keeps ownership of what it brought to the engagement: our methods, internal tooling, templates, and anything developed before or outside your project. Where a piece of that is embedded in what we deliver, you receive a permanent right to keep using it as part of your system at no further charge, including if the business is sold. Embedding it does not give us ownership of your system.

This website, its content, and the Castalin name and branding remain the property of Castalin.

6. Confidentiality

We treat everything shared during a demo, a discovery call, or an engagement as confidential. We do not share your business information, processes, financials or data with anyone outside Castalin without your written consent, except where the law requires it. The same obligation runs the other way, covering our proposals, scopes and materials.

We will not name you as a client or publish your results without your consent.

7. SMS Communications

By submitting your phone number through our contact form, you consent to receive SMS text messages from Castalin regarding your inquiry, scheduling, and services. Message frequency varies based on your engagement with us.

Standard message and data rates may apply depending on your carrier. To opt out at any time, reply STOP to any SMS message, or reply HELP to ask for assistance. Our texts are sent and read by a person, not an automated system, so there is no instant automatic reply; the person who reads it acts on it. You can also email hello@castalin.com and ask to be taken off SMS. However the request reaches us, it takes effect the moment we receive it and the removal is completed within one business day. If a message still reaches you after that, write to the same address and we will put it right. Opting out of SMS does not affect your ability to receive services or email from us.

We do not use SMS for promotional or marketing campaigns to third parties. SMS communications are limited to transactional and service-related messages.

8. Using This Website

You agree not to use this website to transmit unlawful, harmful, or objectionable content, to attempt unauthorized access to any systems, or to interfere with the website’s operation. There are no user accounts on this site and we do not offer one, so everything you send us arrives through a form. We reserve the right to withdraw access for violations of these terms.

9. Third-Party Services

This website is hosted on Vercel and stores form submissions in Supabase. Every form submission also raises a notification in our own private Slack channel, so a new inquiry is seen the same day. On the production site we use Vercel Web Analytics and, where a measurement ID is configured, Google Analytics. Your use of those services is governed by their own terms and privacy policies.

Our Privacy Policy is the full account of what each of those services receives and what we do with it. Where this page and the Privacy Policy describe the same thing, the Privacy Policy governs.

10. No Warranty

Castalin provides this website and its services on an “as is” basis, without warranties of any kind except those the law does not permit us to exclude. We do not guarantee any particular revenue, close rate, lead volume, or other business result. The two guarantees in section 3 are commitments about what we do when a result does not appear, not promises that it will. Client results published on this site belong to the named companies described there and are not a prediction of what your company will see.

What we do commit to is measurement. A baseline is captured before anything is built, and the same numbers are reported back on the schedule set in your agreement, so the effect of the work is visible either way.

11. Limitation of Liability

To the fullest extent permitted by law, we are not liable for any indirect, incidental, or consequential damages arising from the use of our services or this website. Our total liability in any matter related to our services shall not exceed the amount paid by the client in the 90 days preceding the claim. If you have not paid us anything, our liability is limited to the fullest extent the law allows.

12. Ending an Engagement

Either side may end an engagement in the manner set out in the signed agreement. Work completed up to that point is payable. You keep every deliverable you have paid for, and we hand back your data and access in a usable form.

Maintenance and support is not a fixed-term commitment. If you stop it, the system stays yours and keeps running, though we are no longer maintaining or supporting it. We may stop work where invoices go unpaid, or where continuing would require us to act unlawfully.

13. Governing Law

These Terms of Service are governed by the laws of the State of California, without regard to its conflict of laws rules. Any disputes arising from these terms or our services shall be resolved through good-faith negotiation, and if unresolved, through binding arbitration seated in California.

We work with clients across the United States. Where your company is based does not change the law these terms are read under.

14. Changes to These Terms

We may update these Terms of Service. Changes are posted on this page and the date at the top is updated with them. Continued use of our website after a change constitutes acceptance of the updated terms. A signed service agreement is not altered by a change to this page.

15. Contact

For questions about these Terms of Service, or to send a legal notice: