Services · Ecommerce development · AI sales assistant subscription sites

London subscription sites that close both card sign-ups and procurement-led deals.

We provide AI sales assistant subscription website development London vendors rely on to sell to two very different buyers at once. A founder in Hackney wants to choose a plan and pay by card in a few minutes. A revenue team at a bank in Canary Wharf wants a security pack, a negotiated quote, a purchase order and an invoice in three currencies. Codeeo builds one commercial platform that serves both: transparent pricing, recurring billing, contract-based subscriptions and a self-serve account area, wired to the assistant so access follows payment.

London is where many UK sales technology companies raise money and hire, and where their largest prospects sit. The billing platform has to stand up to investor diligence and enterprise procurement as well as to impatient small customers, and it has to be easy for your own team to change prices as packaging evolves.

Scope your billing platformWeb development and eCommerce
Built for
AI sales assistant and sales copilot vendors based in London, or selling into London enterprises, that need self-serve and contract billing on one platform.
Typical timeline
Agreed in writing after discovery, once we have reviewed your price book, contract templates, payment providers and the systems that hold customer data.
What you own
All code, the billing engine configuration, provider accounts, price books, contracts, invoices and customer records, registered to your company rather than to us.
Rated
4.7 / 5 from 23 Google reviews

200+ companies servedFrom a first store to an ADX listed developer

Modon
Majid Al Futtaim
HP
Belkin
Dulsco Group
OneClickDrive
Hanayen
HMS
Clocksprings
Ghezlan

What we build

A commercial layer built for London buyers who read the small print.

London buyers of sales software are well informed and well advised. Procurement teams in the City and Canary Wharf send questionnaires before any trial, legal teams redline order forms, and finance teams reject invoices that lack a purchase order reference. Smaller customers in Shoreditch, Old Street and King's Cross behave differently: they compare three tools on a Sunday evening and buy the one whose pricing page makes sense.

For AI sales assistant SaaS website development London companies need the pages and flows below working together. They sit on a billing engine you control and a front end we build for speed, and every part reports into the same revenue figures. Where a feature depends on a decision only your accountant or solicitor can make, such as VAT treatment of overseas customers or the wording of your order form, we build to their instruction and leave a clear audit trail. Pages are written in plain British English, load quickly on mobile connections and work for buyers using assistive technology.

Explain your project

  • Multi-currency price books

    Prices set deliberately in GBP, EUR and USD rather than converted on the fly, so a buyer in Dublin or New York sees a stable figure. The billing engine invoices in the agreed currency and your accounting export shows each currency separately for reconciliation.

    International buyers see prices that do not drift with exchange rates.

  • Order forms and e-signature

    Quotes generated from the live price book with approved discounts only, sent as an order form, signed online and turned into a subscription with start date, term, seats and payment terms already set. No one retypes a signed contract into the billing system.

    Signed deals become live subscriptions the same day.

  • Purchase orders and invoice billing

    PO numbers captured at signing and printed on every invoice, supplier onboarding details stored against the account, and payment terms such as net 30 applied automatically. Late invoices trigger reminders to the finance contact, not the champion who bought the tool.

    Invoices are paid instead of bounced back by accounts payable.

  • Trust and security pages

    A trust area covering data handling, sub-processors, hosting regions, UK GDPR roles and how your assistant uses customer data for model calls. Gated documents such as penetration test summaries are released to verified prospects through a request flow.

    Security reviews start with answers instead of a blank questionnaire.

  • Self-serve checkout for smaller teams

    Plan selection, VAT number capture, card payment with Strong Customer Authentication on the first charge, and immediate provisioning of the workspace. Totals include every compulsory charge, as the DMCC Act drip pricing rules require.

    Small London teams start using the product the moment they pay.

  • Account hierarchies

    Group companies with several subsidiaries or regional sales teams billed separately or together, with a parent account that sees consolidated usage. Seats can be moved between child accounts without cancelling and recreating subscriptions.

    One customer, several billing entities, no spreadsheet.

  • Usage and AI cost pass-through

    When your margins depend on model and enrichment costs, we meter the expensive actions, such as research briefs generated or contacts enriched, and bill them as credits, bundles or overage. Customers see consumption live in their account.

    Heavy users pay for heavy use and margins stay predictable.

  • Renewals and co-terming

    Mid-term seat additions co-termed to the main contract, renewal notices sent ahead of the date your contracts specify, and renewal quotes prepared automatically for your account managers to review.

    Renewals are handled on schedule, not discovered after the date.

  • Self-serve account and billing area

    Admins download invoices, change billing contacts, update payment methods, add seats and see renewal dates without emailing your team. Role permissions let a finance manager pay invoices without being able to change the assistant's sales settings, which London procurement teams often ask about.

    Routine billing requests stop reaching your customer success team.

  • Billing integration services for your stack

    Connections between the billing engine, your CRM, your accounting software, your data warehouse and the assistant's entitlement service, with failures logged and retried. Sales sees invoice status in the CRM; finance sees contract terms in accounting.

    Every team works from the same subscription record.

Who this is for

Where London vendors usually start.

The four situations below cover most of the London vendors who ask us about billing. Some are a few people in a co-working space; others have a sales floor and a finance director. The common thread is that pricing, contracts and payment have grown up separately and now pull against each other, and a growing share of revenue comes from buyers who will not use a card checkout at all. If one of these describes you, discovery starts with the revenue you already have, because moving existing customers safely matters more than any new pricing page.

01

Seed and Series A vendors preparing for diligence

Investors want clean recurring revenue figures, a clear record of each contract and evidence that churn and expansion are measured consistently. If those numbers currently come from a spreadsheet stitched together each month, we move subscriptions into a billing engine with reporting that survives scrutiny, and document how each metric is calculated. The same reports then serve board meetings, so nobody rebuilds them by hand every quarter.

We do not give investment or accounting advice; your advisers confirm the definitions.

02

Vendors selling into regulated London firms

Banks, insurers and investment firms supervised by the FCA ask detailed questions about data residency, outsourcing and access to customer information before they buy. We build the trust pages, document request flows and data processing terms acceptance into the purchase path so those questions are answered before procurement has to ask them twice. That shortens the gap between a promising demo and a signed order.

03

US or European vendors opening a London sales team

You already bill in dollars or euros and now need GBP pricing, UK VAT on invoices, a privacy notice that reflects UK GDPR and the ICO, and terms governed by English law. We add a UK commercial layer to your existing billing engine instead of running a second system, so headquarters still sees one revenue figure across markets.

04

Agencies reselling an assistant to their clients

Marketing and lead generation agencies in London often bundle an AI sales assistant into retainers. They need reseller pricing, sub-accounts per client, usage reports per client and invoices they can pass on. We build partner billing so you can sell through agencies without handling every end client yourself, and so agencies cannot sell below the floor price you set.

How a London subscription platform comes together.

  1. 01Commercial discoveryVideo sessions with sales, finance and product to map price books, discount rules, contract terms, currencies and the questions procurement teams keep asking you.
  2. 02Legal and tax inputsYour solicitor's order form and terms, your accountant's VAT rules for UK and overseas customers, and your privacy notice reviewed against the flows we plan to build.
  3. 03Design for two buyersSeparate paths for self-serve and sales-led buyers that share a pricing source, tested with real prospects and checked against WCAG 2.2 for keyboard and screen reader use.
  4. 04Billing and data buildBilling engine, payment providers, e-signature, CRM, accounting and warehouse connected, with event handling that cannot charge a customer twice or miss a renewal.
  5. 05Contract migrationExisting order forms and subscriptions loaded with correct terms, renewal dates and payment methods, then reconciled line by line against your current revenue records, with a rollback plan agreed before the switch.
  6. 06Revenue operations supportPricing changes, new currencies, packaging tests and report changes delivered in small releases as your sales motion in London and beyond matures.

Technology

What we build this with.

Front ends in Next.js or React for fast pricing and account pages, a hosted subscription billing engine, card and Direct Debit providers, e-signature, and API connections to your CRM, accounting software and data warehouse.

01Web

  • React
  • Next.js
  • TypeScript
  • Node.js
  • Laravel
  • WordPress

02Commerce

  • Shopify Plus
  • WooCommerce
  • BigCommerce
  • Headless storefronts

03Data and cloud

  • PostgreSQL
  • MySQL
  • MongoDB
  • AWS
  • Azure
  • Docker

04Marketing and tracking

  • GA4
  • Google Tag Manager
  • Search Console
  • Meta Pixel
  • Looker Studio

What London vendors ask about subscription billing.

Shorter for self-serve only, longer once contracts and migration are involved.

A self-serve pricing page and card checkout on a modern billing engine is the quickest part. Order forms, purchase order billing, multi-currency price books and account hierarchies each add design and testing, and migrating signed contracts with their real renewal dates takes careful reconciliation. After discovery we put a dated plan in writing, split into releases, so the sales-led path can follow a self-serve launch if that suits you. Waiting on outside parties, such as a payment provider's underwriting or your solicitor's order form, is shown in the plan so delays are visible early.

Services that usually go with this one.

Custom software and business systemsQuoting, entitlement and partner tools built around how you actually sell.Payment integrationCard, Direct Debit and multi-currency providers connected to your billing engine and tested against real bank responses.Next.js developersFast pricing and account pages that search engines and buyers both read easily.

Tell us what the business needs. We will tell you what to build first.

Schedule a free consultation and get a written recommendation, with costs, before you commit to anything.

Get in touch

PROVEN RESULTS

4.7 / 5from 23 Google reviews