# PlausiDen LLC

> IT operations, cyber security and disaster recovery for Massachusetts practices of 5 to 100 staff that hold confidential client data. Fixed scope, fixed price, published rates. The engineer on the scoping call does the work.

## Services

- [Services overview](https://plausiden.com/services): all eight service lines, with capabilities and sample engagements
- [IT Operations](https://plausiden.com/services/it-operations): Patch windows agreed in advance, restores that are actually tested, and runbooks written before the outage rather than during it. Monitoring you can read…
- [Disaster Recovery](https://plausiden.com/services/disaster-recovery): Recovery posture engineered to be tested, not just documented. We design backup + restore + failover so the procedure on paper matches the procedure under…
- [Cyber Security](https://plausiden.com/services/cyber-security): Defense sized to what would actually hurt you: threat modeling first, then endpoint defense, then all four email authentication records — SPF, DKIM, DMARC and…
- [Artificial Intelligence](https://plausiden.com/services/artificial-intelligence): Practical AI integration that solves a real bottleneck — not AI for AI's sake. We help you identify where machine learning earns its keep, build it cleanly…
- [Industrial Automation](https://plausiden.com/services/industrial-automation): Control and monitoring for equipment that has to keep running, with the production network properly isolated from the corporate one. Your control plane does not…
- [Software Development](https://plausiden.com/services/software-development): Custom software for anything you can describe. If a workflow is yours, a tool is yours, a system is yours, we build it the way it should be built — typed…
- [Hardware Solutions](https://plausiden.com/services/hardware-solutions): Procurement at pass-through pricing, standardized device images, and an asset register that knows who has what. Hardware is where small-organization IT quietly…
- [Network Architecture](https://plausiden.com/services/network-architecture): Network architecture that stays up and stays fast, without enterprise-tier complexity. We design connectivity that scales with you and stays operable by your…
- [Managed IT (MSP)](https://plausiden.com/services/managed-it): Everything above under a single monthly retainer, with the scope written down before you sign rather than discovered at the first invoice. You get a named…

## Industries

- [Legal](https://plausiden.com/solutions/legal): IT infrastructure your duty of confidentiality can rest on.
- [Healthcare](https://plausiden.com/solutions/healthcare): Patient confidentiality, designed in.
- [Journalism](https://plausiden.com/solutions/journalism): Sources should be able to trust you. Your tools should too.
- [Financial Advisors](https://plausiden.com/solutions/financial-advisors): Custodians are asking. Be ready before they do.
- [Nonprofits](https://plausiden.com/solutions/nonprofit): Donor trust and beneficiary confidentiality, designed in.

## How we work

- [How we work](https://plausiden.com/how-we-work): written proposals with specific scope, deliverables and price; documentation a successor can run without us
- [Pricing](https://plausiden.com/pricing-transparency): published rates and the fixed-price model, matching the quoting tool exactly
- [Sample report](https://plausiden.com/sample-report): what an assessment deliverable actually looks like
- [About](https://plausiden.com/about): who we are and when we are not the right fit
- [Contact](https://plausiden.com/contact): book a scoping call

## Insights

- [What falls outside a managed IT contract](https://plausiden.com/blog/what-falls-outside-a-managed-it-contract): Contracts specify activities; you need outcomes. Three findings from our own audit that a contract being honored to the letter would have covered.
- [Why one practice answers an audit in a day](https://plausiden.com/blog/why-one-practice-answers-in-a-day): Measured timings for audit-shaped questions against our own systems, and the three we could not answer. The difference is recording, not diligence.
- [A renewal that would have failed silently](https://plausiden.com/blog/a-renewal-that-would-have-failed-silently): Two correct decisions combined into a certificate renewal that would have failed silently, and the check that catches the causes nobody predicted.
- [Testing a backup takes four minutes](https://plausiden.com/blog/testing-a-backup): A restore test of our own mail backup, and the two things beyond the data that decide whether a restore actually produces a working system.
- [A check that has never passed is not a check](https://plausiden.com/blog/a-check-that-has-never-passed): A monitor on our mail domain failed every day for four months while the thing it watched was healthy. The question worth asking of every check you own.
- [What plausible deniability means in our architecture](https://plausiden.com/blog/plausible-deniability): We named the company after a phrase. Most privacy products sell hiding; we sell unreliability. What that buys, and the lines we will not cross to ship it.
- [Why we're building Thundercrab](https://plausiden.com/blog/why-thundercrab): Consumer mail clients replaced an open filtering standard with ML categorization nobody can read, edit or carry between providers. We build the alternative.
- [Provable-by-construction privacy](https://plausiden.com/blog/provable-privacy): Two ways to promise to protect data: a policy you trust, or a property the type system enforces. We pick the second where the engineering allows.
- [How a written-down doctrine changes what "shipping" means](https://plausiden.com/blog/avp-doctrine): We wrote our taste down. Every public function carries a BUG ASSUMPTION annotation, every defense a SECURITY annotation, and CI enforces both.
- [Federated rule learning, without ever reading your mail](https://plausiden.com/blog/federated-rule-learning): How sorting rules get smarter from the collective without any provider — us included — ever seeing message content. What we built, and why it matters.

## Reference

- [Why Plausible Privacy Software](https://plausiden.com/docs/why-pps): why we build privacy posture as auditable software
- [The PlausiDen ecosystem](https://plausiden.com/docs/ecosystem): the self-operated stack behind the services, held to six axes at once
- This site is open source: https://github.com/thepictishbeast/plausiden.com