Fixed-scope offer
API integration in 2 to 4 weeks
- Price
- From £3,500Most single integrations land between £3,500 and £6,000; middleware joining several systems from £12,000.
- Time
- 2 to 4 weeks
- Payment
- 50% deposit to book, balance on launch; monthly plans billed in advance.
Two systems you already use connected properly: the records that should move, moving on their own, with retries, idempotency and an alert when something stops. A fixed price for an agreed scope, in two to four weeks.
We reply within one working day.
What happens after you get in touch
We reply within one working day.
Step 1
We reply within one working day
We read what you sent and come back with questions, a rough view of cost, or a time to talk.
Step 2
A 20-minute call
We talk through what you need and tell you honestly whether we're the right team. No charge and no obligation.
Step 3
A written, fixed-price proposal
Scope, price and timeline in writing. Nothing starts until you've signed it off.
Who it's for
Businesses whose team copies data between systems by hand, or whose Zapier flow or old script keeps breaking, and who want one named integration done properly rather than a day rate and a shrug.
What you get: A working integration in your own repository and cloud account, a mapping document, a runbook, and monitoring that tells you when it stops.
What's included
- A discovery call and a one-page scope: which systems, which records, which direction, how often, and a fixed price and start date.
- Access checks on every API before we quote: keys, OAuth apps, sandbox accounts and any approval queues, so the surprises come first rather than last.
- A written field mapping covering duplicates, partial records, refunds, cancellations and time zones, signed off before the build.
- The integration itself, with an idempotency key on every incoming event, retries with backoff on every outgoing call, respect for the provider's rate limits, and logs detailed enough to replay a failure.
- A staging environment pointed at the providers' sandboxes, so you test with realistic data before anything touches a live account.
- Monitoring and an alert when a queue backs up, a token expires or a provider is down.
- Handover: the code in your repository, accounts in your name, the mapping document, a runbook for the failures we expect, and a walkthrough with whoever will look after it.
Not included
- Subscriptions to the systems themselves, and any provider's API or transaction fees. Those are paid by you to the provider so the accounts are yours.
- A new web or mobile app on either end. If one of the systems is a product that doesn't exist yet, that is a separate project and we quote it as one.
- Data cleaning in the source systems. We map and move what is there; if the records need tidying first, we scope that separately.
- Changes a provider makes to its API after handover. On the Ongoing development plan we track and make those updates; otherwise the runbook tells you where to look.
What each budget buys
From £3,500; most single integrations land between £3,500 and £6,000; middleware joining several systems from £12,000. Three honest examples of scope, so you can place your own idea before we talk. 50% deposit to book, balance on launch; monthly plans billed in advance.
About £3,500
One direction, one record type
Events from one system create or update records in another: Stripe payments raised as Xero invoices, website bookings pushed to HubSpot as deals, Shopify orders sent to a courier for labels. Webhook or scheduled, with retries, idempotency, logging and an alert.
About £6,000
Two-way sync with history
Records that live in both systems and change in both, kept in step with clear rules for conflicts, plus a one-off backfill of existing records. Typical for CRM to app customer sync, or stock between a shop and a warehouse.
About £12,000
A middleware layer for several systems
Three or more systems sharing one set of records and rules through a small service you own: orders, payments, accounting and shipping all reading from the same source of truth, with a dashboard of what moved and what failed. Six to ten weeks.
How it runs
- Week 1Discovery and mapping: the scope, access to every API, and the field mapping document, signed off by you. The mapping sets the price and whether the build takes two weeks or four.
- Weeks 2 to 3Build against the providers' sandboxes, with a working staging integration you can watch and a short review call each week.
- Final weekBackfill if needed, switch to live accounts, monitoring on, then handover: code, accounts, runbook and walkthrough.
Why trust us with it
We run our own business on integrations we built this way: an anonymous usage-data service on Google Cloud Run and BigQuery that our apps report to, App Store Connect API automation that publishes our listings in nine languages and feeds our sales dashboard, Stripe webhooks that record payments on this site, and a client portal on Firestore. We have no client integration case study yet, and we won't invent one.
After launch
Keep it working after launch
Websites and apps need looking after once they're live. Ongoing development is the plan most people choose after this, at from £1,500 a month.
Already have an app or site that needs looking after?2 reserved build days a month, more if you need themFits after this
Ongoing development
From £1,500 a month
From £1,500 a month for 2 reserved build days to keep improving your app or web product, with a backlog we prioritise together and a release each month.
What's coveredin Ongoing developmentUp to 1 hour of small edits a month
Website care
£95 a month
We keep your website online, up to date and secure, and make the small changes you need each month.
What's coveredin Website careUp to 3 hours of changes a month
Website care Plus
£195 a month
Everything in Website care, with three hours of changes a month for sites that need new pages, offers or content most months.
What's coveredin Website care PlusUp to 4 hours of changes a month
App care
£550 a month
We keep your app working on each new iOS or Android, passing App Review or Play policy and looking current in the store, with time each month for changes.
What's coveredin App care
Month to month, billed in advance. Cancel with 30 days' notice. Pay yearly for two months free. Prices exclude VAT.
Questions we get asked
One integration between two named systems, in one direction, for one kind of record: for example Stripe payments raised as Xero invoices, or website bookings pushed into HubSpot. That includes discovery, the mapping document, the build with retries and monitoring, a staging environment and handover. Two-way sync, backfilling history or more record types move it towards £6,000, and we tell you which in the scope before you commit.
Often, yes, and we'll say so on the first call. If you are moving a form submission to a CRM or posting a notification, a no-code tool is the right answer and we can set it up as part of a wider project. Custom code is worth paying for when a wrong or duplicate record costs you money, when records change in both systems, when volumes make per-task pricing expensive, or when a system has no connector.
Our own integrations run on Stripe, the App Store Connect API, Google Cloud Run, BigQuery and Firestore. The offer covers any system with a documented API, and the common UK stack we quote for is Stripe, GoCardless, Xero, QuickBooks, HubSpot, Salesforce, Shopify, WooCommerce, Royal Mail, DPD, Evri, Open Banking providers, Companies House and the Google Play and App Store Connect APIs. If a system has no API, we tell you what the options are before quoting.
It tells you. Every integration ships with monitoring and an alert when a queue backs up, a token expires or a provider is down, and the logs hold enough detail to replay a failed event. On the Ongoing development plan we get the same alert and fix it as part of the plan; otherwise the runbook says what to check and how.
You do, from the first week. The code sits in your repository, runs in your cloud account and uses API accounts registered to you. Nothing of ours needs a continuing payment, and any developer can take it on with the handover documentation.
A 50% deposit to book the start date and the balance on launch, when the integration is running against live accounts. Prices exclude VAT.
Read before you start
- After launch
- Plan your budget
Other ways to start
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- Smart contract and Web3 integrationFrom £6,000, 3 to 5 weeks
- Web3 app MVP in 8 to 12 weeksFrom £20,000, 8 to 12 weeks
- App Store launch package£1,500, 5 working days
- On-device AI featureFrom £6,000, 3 to 6 weeks
- iPhone Duo readiness reviewFrom £2,500, 2 weeks
- App broken, rejected or abandoned?One place to start
- Something bigger or differentAll services
Start with a 20-minute call with our team.
Tell us where you are and what you need. We'll tell you honestly whether this offer fits, or what would. We reply within one working day.
We reply within one working day. Or call 020 3540 5048