Blueprints for the era of custom software
Give a blueprint to your coding agent and it builds software shaped to your company on SegmentStream. Each one carries the design, the questions to ask, the rules that must always hold and the mistakes to avoid, taken from software in production.
Not a package to install. An example your agent builds from.
Companies no longer have to rent software built for someone else’s process, or install someone else’s code and bend it to fit. With a good example, a coding agent can build software shaped to your company. Blueprints are those examples, and SegmentStream runs what your agent builds: sign-in, roles checked on every record, a history of every change, and an API and MCP tools for your other agents.
- BLUEPRINT.mdThe designRecords, actions, roles, workflows, data flow, screens and the build order.
- INTERVIEW.mdThe interviewWhat your agent asks about your company, and what each answer changes.
- INVARIANTS.mdThe invariantsRules that must hold in every version, each one a test in your project.
- VARIATIONS.mdThe variationsWhere companies legitimately differ, and the default for each.
- PITFALLS.mdThe pitfallsMistakes agents already made in production, so yours does not.
Blueprints are provided as is; see the disclaimer.
Paste one prompt. Name what you want.
Paste it into Claude Code, Codex or Cursor with the blueprint you want, or simply the tool you want to replace. Your agent picks the blueprints, asks how your company works, shows you a one-page plan, and builds only once you approve it.
Read https://github.com/segmentstream/build-your-own/blob/main/AGENTS.md and follow it.
Build our CRM from the crm blueprint.What your agent can build
Our own team runs the company on software built from these designs, from the CRM and campaigns to the books, documents and signatures. That is where the designs come from; it is not a guarantee about any version built from them. Most build on a shared foundation of companies, contacts and members, so the ones you build work together.
- Marketing analyticsYour own tracker, sessions, identity graph, ad costs, conversions and attribution in a warehouse you own, with reports on people, channels, spend and the AI agents that read your site.Instead of Google Analytics (GA4), Adobe Analytics, Mixpanel, Heap and 10 moreBuild your own →
- CRMLeads from your forms, triage, deal pipelines and customers on your own companies and contacts, shaped to how you sell.Instead of Salesforce, HubSpot, Microsoft Dynamics 365, Zoho CRM and 4 moreBuild your own →
- Email marketingConsent by topic, audiences on your own customer records, campaigns with a separate approval, and delivery events that keep your list clean.Instead of Mailchimp, Klaviyo, HubSpot Marketing Hub, ActiveCampaign and 5 moreBuild your own →
- BookkeepingOne general ledger for invoices, bills, expenses with receipts, fixed assets and multi-currency, with the reports your accountant reads.Instead of QuickBooks, Xero, Sage, FreshBooks and 2 moreBuild your own →
- Ad fraud and bot detectionA verdict with its evidence for every website session and conversion: the full rule set SegmentStream runs in production for bots, spoofed crawlers, automation, data-centre traffic and AI agents.Instead of ClickCease, CHEQ, TrafficGuard, Spider AF and 7 moreBuild your own →
- Company agentAn AI agent in your team’s chats that works on your own records, with the permissions of whoever asks.Instead of Microsoft 365 Copilot, ChatGPT Enterprise, Gemini for Google Workspace, Slack AI and 4 moreBuild your own →
- DriveCompany files and online documents in one folder tree, with versions, PDFs, sharing, comments and an access log.Instead of Google Drive, Google Docs, Microsoft SharePoint, OneDrive and 3 moreBuild your own →
- E-signatureEnvelopes, signers, a signing page and sealed, timestamped PDFs.Instead of DocuSign, Adobe Acrobat Sign, Dropbox Sign (formerly HelloSign), PandaDoc and 6 moreBuild your own →
The platform does the heavy lifting
A blueprint tells your agent what to build. The SegmentStream platform is where it runs, and it takes on the parts of company software that are hardest to build and to keep running. Your agent writes only your business logic: the records, rules, screens and reports that make the software yours.
| SegmentStream runs | So your agent never builds or operates |
|---|---|
| A company database →Every write is an action with a permission check on the server, for people, apps and agents alike. Every change is kept in history. Schema changes are planned, tried on a copy first, and refused when unsafe. | So your agent never builds or operatesA database, migrations, an API, an authorization layer and an audit log |
| Sign-in and roles →Members sign in; roles are written in code and enforced on every record. | So your agent never builds or operatesAn identity provider and an access model |
| An API and MCP server for every record →Claude, ChatGPT and your own agents work with your software through the same permission checks as people. | So your agent never builds or operatesAn integration layer for agents |
| Real-time event collectionOne endpoint, served by the nearest healthy collector in the US or EU, streams events into warehouse tables in your region with no ingestion job. A first-party tracker covers the browser and the server. | So your agent never builds or operatesA tag pipeline, collectors and queues |
| A warehouse with a metrics layer →Your records replicate into it automatically, next to event and provider data. The same metrics answer screens, the API and agents. | So your agent never builds or operatesA data warehouse, replication from your database and a semantic layer |
| Pipelines →Managed orchestration of ingestions and models: schedules, daily partitions, backfills, retries, checks and lineage, each step in its own isolated worker. | So your agent never builds or operatesAn orchestrator, its workers and a transformation tool |
| Secure connections →OAuth and API-key connections to the tools you use, in and out. Credentials stay in SegmentStream and reach the provider through a proxy; your code never sees them. | So your agent never builds or operatesA secrets store, token refresh and connectors |
| Workflows and webhooks →Durable processes started by an action, a schedule or a webhook, with retries and a record of every run. | So your agent never builds or operatesA job queue, its workers and webhook endpoints |
| A company agent →Your team’s agent in Telegram, Slack or WhatsApp, acting with each member’s own permissions. | So your agent never builds or operatesAn agent runtime and chat integrations |
| Hosting and safe change →Deploys from your Git repository, previews, and development sessions on a private copy of production data, in the region you choose (EU or US). | So your agent never builds or operatesServers, CI and staging environments |
As with any cloud platform, SegmentStream runs the infrastructure, and what you build on it is your company’s own software, in your company’s own Git repository.
Explore the platform →Your agent asks, plans, then builds.
- 01
Pick
Your agent reads the registry and chooses the blueprints that match what you asked for, with the ones they build on.
- 02
Interview
It asks the questions in the blueprint’s interview: how you sell, who approves what, which tools you keep. About ten questions, once.
- 03
Plan
It shows you one page: the records, actions, roles, screens and data sources it will build, and what it leaves out. You approve or change it.
- 04
Build and test
It writes your version and turns every invariant into a test that runs on your laptop, with no account and no real data.
- 05
Deploy
When you say so, it deploys to your SegmentStream workspace. You authorize your own connections; your data never touches the blueprints repository.
- Replacing a specific tool?The alternatives list maps more than 70 products to the blueprint built to replace them.See the alternatives list
- Missing something your company needs?Request a blueprint, or add a thumbs-up to an open request. The most-wanted ones are built first.Request a blueprint
- Know a business from the inside?Write down what generic software gets wrong about your industry. Your agent interviews you and writes the files.How to contribute
Questions
What is a blueprint?
What we learned running a piece of company software in production, written so a coding agent can build your own version of it: the design, the questions to ask you, the rules that must always hold with their tests, where companies differ, and the mistakes agents already made. Nothing is installed; your agent writes your version into your own repository.
Is this open source?
The blueprints are Apache-2.0: read, adapt and reuse them freely. They are written for SegmentStream, which runs the software your agent builds, and their designs, invariants and interviews are useful on any stack.
Do I need to be a developer?
No, to get a first version. You need a coding agent such as Claude Code, Codex or Cursor, and the ability to answer questions about how your company works. The agent writes, tests and deploys the code. Before you rely on it, have someone who can read code review it.
What does it cost?
The blueprints are free. Running your software on SegmentStream is billed by usage, with no seats and no feature gates.
Does a blueprint touch our data?
No: the blueprints repository contains only designs and invented demo data. Your data reaches only your own workspace, through connections you authorize.
Who is responsible for the software I build?
Your company, as with any software it writes. A blueprint is a design and the lessons behind it, not certified or supported software, and nothing in it is legal, tax or financial advice. Your agent writes the code into your own repository; you review it, test it, and decide what it does with money, messages, signatures and personal data. Have a qualified professional check anything with legal or tax effect before you rely on it. SegmentStream runs the platform; it does not certify or warrant software built from these blueprints, which are provided as is. See the disclaimer.
Can someone build it for us?
Yes. Our engineers build the first version on your data in two weeks, at a fixed price, starting with a pilot.
Build your company’s own software. Let agents run it.
$ segmentstream workspace create acme --region eu --subdomain acme
▸ Created workspace acme · database, warehouse and a private git repository
$ segmentstream workspace WORKSPACE-ID clone acme && cd acme
▸ your coding agent builds what your team asked for and runs the checks
$ git add -A && git commit -m "First version"
$ segmentstream deploy
▸ app, company agent, API and MCP tools live for your invited members
Our engineers build the first version on your data in two weeks, at a fixed price.
Or build it yourself with your coding agent:
curl -fsSL https://segmentstream.com/install.sh | sh