CMS & Apps
We build content operating systems on Sanity: one place to run your website, keep your team's work moving, and give your agents real context about your business.
Your product facts, pricing and customer stories probably live in a CMS, a few slide decks and someone's spreadsheet. Your team copies them from one place to the next, and when you connect an AI agent, it finds three versions of the same answer with no way to know which one is current. You need a system where all your content has a logical place to go, everyone (your customers, your team and your AI agents) can find what they're looking for, and updates stay effortlessly in sync.
Bits & Letters designs and builds content management systems with Sanity. We handle content modeling, custom editing interfaces, front-end integration, and hosting.
Move your site off Webflow, WordPress, Wix or Squarespace, and bring your content, URLs and metadata with you.
We build enterprise-ready content systems powered by WordPress, for companies and orgs with large existing datasets or strict OSS requirements. Go headless with Astro, or keep WordPress as your whole stack. It's up to you.
Design systems that connect brand design to web implementation. Components, patterns, and documentation so your team can produce pages without starting from scratch.
Stripe
For Stripe's 2025 Black Friday livestream, we built the system behind 11 tiny billboards in Stripe City, a hand-built miniature downtown, each showing live transaction metrics, customer logos or charts from Stripe's X mentions. Sanity carried the live data to every screen and let the production crew, none of them developers, swap logos and fix images in the Studio during the broadcast.
Everself
A lush, video-rich new brand experience delivered in just 8 weeks, with near perfect Lighthouse & Core Web Vitals scores
Oso
A component system inside Oso’s Webflow site that let developer marketing build use case, customer and campaign pages from reusable parts.
Selected clients
We start by talking with your editors, marketers and developers, and mapping where your content lives today: which systems, which spreadsheets, and who updates what. You get a plan for what moves into Sanity first and what it needs to connect to.
We model your content as structured data with clear relationships, then design a Studio around how each team works, with custom document types, review steps and collaboration built in.
We build in stages, from custom React fields and views up to whole tools inside the Studio. When a workflow needs its own interface, we build it as a Sanity App or an Astro or Next.js application on your content, connected to your other systems.
We move your content out of its current CMS, docs and spreadsheets, train your team, and connect Sanity's Content Agent or your own agents over MCP so AI tools work from the same facts.
We start with a conversation about where you are and what you're trying to do.
You bring your goals, your constraints and the people who know the work best.
From there, we either build a first version your team takes over, or stay on as part of your team on a monthly retainer.
Either way, you own the result: code, content and accounts.
An audit of where your content lives today, and a plan for what moves into Sanity first.
Structuring pricing, features and stories as data you can reuse.
A Sanity Studio set up around how your team edits and publishes. → Sanity CMS development
Custom fields, views and tools built in React.
Content-shaped internal tools, and connections to your other systems and agents.
Moving content out of your current CMS, docs and spreadsheets.
Docs, videos and workshops so editors and developers can work on their own.
Ongoing updates, fixes and new features after launch.
Bits&Letters is a founder-led web & product consultancy based in the New York City area. We plan, design, and build websites and apps for startups and mid-size businesses across a range of industries, especially B2B tech, healthcare, and fintech.
Our founder David Demaree helped build UI tools and infrastructure, including Adobe Fonts, Material Design, and Webflow.
Now, at Bits&Letters, David works with clients to set up better systems, so you can deliver web experiences that are secure, fresh, and engaging for your users, without anyone having to spend all day worrying about the website.
Through Sanity’s MCP server and APIs, which work with Claude, Codex, Sanity’s own Content Agent or an agent you’ve built. The agent reads the same structured content your website does, so it finds one current answer instead of three versions in three places. Access runs through Sanity’s roles and permissions, and content in a private dataset stays private. Our own proposals live in one that only our web app can read.
Mostly tools built around text and records, where Sanity Studio already handles editing, roles and real-time collaboration. We run parts of our own business this way: proposals that clients read at a private link, a form for collecting logins without sending them over email, and a website checkup that saves every report to Sanity. When a workflow needs its own interface, we build it as a Sanity App or an Astro or Next.js app on the same content.
Some, yes. We keep that small by designing the Studio around how each team already works, with the fields, previews and review steps they need, and by training editors before launch with docs, videos or workshops. Copytree’s team moved from a drag-and-drop builder to Sanity and can now make and preview changes in seconds.
Yes, and connecting it is part of the work. For Stripe City, a small Node.js service polled Stripe’s API every 3 to 6 seconds and wrote each update to a single Sanity document, and Sanity’s live APIs carried it to the billboards. Our own website checkup calls Google’s PageSpeed Insights API, has an AI model write the report, and saves the result to Sanity in the shape of its schema.
A CMS that runs more than your website. Your product facts, pricing and customer stories live in one place as structured data, and the same records feed your site, your team’s internal tools and your AI agents, so a change made once shows up everywhere. Pricing on Rill’s site is structured data in Sanity. After handoff, Rill’s team changed the free tier’s limits and the paid tier’s monthly price as data, without touching the layout.
Sanity isn't just for public websites. Here's how I use it as the backend for three small apps that help me keep Bits&Letters running smoothly.
It’s less about the tooling and more about who needs to change which parts of your website at which speeds.
How AI agents work, why I give them focused jobs, and how I use them at Bits&Letters to find leads, gather newsletter ideas, and keep track of tasks.
We’ll help you find the way forward.
