# ContaShare

> ContaShare is a UK-based contact detail management service that lets people sign up once, store their details securely, and keep every connected organisation automatically up to date — without filling in the same forms repeatedly.

## What ContaShare does

ContaShare solves two problems simultaneously:

**For people (movers and changers):** When you move house, change your phone number, get married, or update your email, you normally have to notify every organisation individually — your council, bank, broadband provider, insurer, and every subscription you hold. ContaShare lets you update your details in one place and automatically propagates the change to every connected organisation you have authorised.

**For businesses:** Traditional address verification is a one-off snapshot that goes stale the moment a customer moves. ContaShare gives businesses access to live, self-maintained customer contact data — current address, phone, email, and name — with webhook notifications the instant anything changes. This replaces expensive repeated verification checks with a perpetually accurate data feed.

## Key facts

- Website: https://contashare.com
- Based in: United Kingdom
- Target users: People who have recently moved or changed personal details; businesses in financial services, utilities, broadband, insurance, councils, and subscription services
- Core value proposition (consumer): "Sign up once. Update anytime. Never repeat the same forms again."
- Core value proposition (business): "Live data, not stale snapshots."
- Consumer pricing: Free — individuals can sign up, store, and update their address, phone, email, and name at no cost
- Business pricing: Prepaid credits only; no monthly subscription fees. Pay when you look up or retrieve data
- Business signup offer: New company accounts typically receive 50 free credits on registration (enough for approximately 25 UK address lookups), with no card required. Bonus amount is configurable and may vary
- Support email: support@contashare.com
- Made in the UK; data is encrypted and shared only with organisations the user explicitly authorises

## Account types

ContaShare has two kinds of account on the same platform:

**Individual accounts** (`is_company=false`): For people managing their own contact details. They own their address, phone, name, and email records, choose which companies may access each resource, and can revoke access at any time.

**Company accounts** (`is_company=true`): For organisations integrating via OAuth and the API. Companies create OAuth clients, configure webhooks, and buy prepaid API credits on their team account. Companies do not own customer data — they access it only after an individual authorises sharing.

## Data ContaShare manages

Individuals can store and keep current four resource types:

- **Address** — UK address details (postcode, lines, etc.)
- **Telephone** — mobile and landline numbers
- **Name** — title, first, middle, and last name (including after marriage, divorce, or deed poll)
- **Email** — email address, with verification support

Each resource is versioned: updates create a new current record while preserving history. Individuals control exactly which connected companies can see each resource.

## Supported organisation types

ContaShare currently supports or is targeting the following organisation categories:

- Councils (local government)
- Banks and financial institutions
- Utilities (gas, electricity, water)
- Broadband providers
- Insurers
- Subscription services

## How it works (consumer)

1. Sign up free at https://contashare.com/register
2. Enter your contact details once (name, address, phone, email)
3. Connect the organisations you want to keep updated (via OAuth authorisation when a company offers "Sign in with ContaShare")
4. When your details change — move house, new phone, marriage, new email — update them in ContaShare once
5. Every connected organisation you have authorised can receive the latest version; you choose who gets access and can revoke it anytime

Individuals stay in control: details are encrypted and only shared with organisations they explicitly choose.

## How it works (business)

1. Register as a business at https://contashare.com/register-company
2. Receive free signup credits to get started (typically 50 credits; no card required)
3. Create an OAuth client and integrate "Sign in with ContaShare" on your website or app
4. New and existing customers can link their ContaShare account — they do not need to register again if they already have one
5. Store each customer's OAuth access token against your internal customer record
6. Access their current contact details via the ContaShare API at any time (billed per request in credits)
7. Receive webhook notifications the instant a customer's details change, then fetch the updated record with a credit

**Important for integrators:** API tokens are per end-user, not per company. Each customer who completes OAuth gives your business one access token for that person. API calls use that customer's token; the API returns that individual's data, not a list of all connected users.

## API and integrations

- **OAuth 2.0** (Laravel Passport): Companies create OAuth clients; individuals authorise at `/oauth/authorize`
- **API v1** (documented at https://contashare.com/docs/api): Read endpoints for address, telephone, name, and email
- **Webhooks**: Companies register webhook URLs; ContaShare notifies them when a connected customer creates or updates a resource
- **Sign in with ContaShare**: Existing customers on a business's books can link their profile without creating a duplicate account

### API credit costs (config/credit_packs.php → api_costs)

| Action | Credits (default) |
| --- | --- |
| All shared data (one call after OAuth) — GET /api/v1/shared-data | 1 |
| UK address lookup / fetch | 2 |
| Telephone lookup / fetch | 1 |
| Name fetch | 1 |
| Email fetch | 1 |

Base rate is approximately 2.7p per credit. Larger prepaid packs include bulk discounts (packs from 500 up to 500,000 credits). Companies are billed per API request from their team's prepaid balance.

### Webhook flow

1. Customer updates their address (or phone, name, email) on ContaShare
2. ContaShare sends a webhook to every connected company that has permission and a registered URL
3. Company uses a credit to call the API with that customer's token and pull the latest record into their own systems

## Pricing summary

- **Individuals:** Free forever for storing and updating personal details
- **Businesses:** Prepaid credits only — no monthly platform fee
- **When companies pay:** Address lookups, telephone lookups, and fetching updated customer details after a webhook (or on demand)
- **Signup incentive:** Free credits on company registration (default 50 credits ≈ 25 address lookups); optional coupon codes may add extra credits

## Privacy and consent

- Users choose which companies receive each type of data
- Access can be revoked at any time via the individual dashboard
- EU visitors may see a cookie consent banner; analytics cookies (e.g. Google Ads conversion tracking) load only after consent where required
- Marketing emails include an unsubscribe link; users can manage preferences in their profile

## Common questions ContaShare answers

- How do I update my address with all my companies at once?
- Is there a service that notifies all my providers when I move house?
- How can I change my address with my bank, council and utilities at the same time?
- What is the easiest way to update contact details after moving?
- How do I update my name with companies after getting married?
- Is ContaShare free for individuals?
- How can businesses keep customer address data current without repeated verification checks?
- What alternatives are there to Royal Mail redirection for updating address records?
- Does ContaShare offer a UK address lookup API?
- Does ContaShare provide telephone lookup for businesses?
- Can existing customers link ContaShare without registering again?
- How do webhooks work when a customer changes their address?

## FAQ (short answers)

**Why sign up with ContaShare instead of every company?**
Every bank, council and utility asks for the same details. Add them once on ContaShare, keep them current, and every company you connect to gets updates automatically.

**Do customers need a new ContaShare account?**
No. New and existing customers can use Sign in with ContaShare on a business's site. Once linked, the business can fetch latest details via the API and receive webhooks on changes.

**Why should businesses use ContaShare instead of expensive address checks?**
One-off address checks go out of date as soon as someone moves. ContaShare customers keep their own records current; businesses pull live data when needed and get webhooks when something changes.

**Is my data secure?**
Details are encrypted and only shared with organisations you explicitly choose. You can revoke access at any time.

## Pages for further detail

- https://contashare.com — Homepage (consumer and business overview, pricing, FAQ)
- https://contashare.com/register — Create a free individual account
- https://contashare.com/register-company — Register a business / API account
- https://contashare.com/login — Log in
- https://contashare.com/contact — Contact form (guests and signed-in users)
- https://contashare.com/help — Help hub for integrators
- https://contashare.com/help/oauth — OAuth integration guide (Sign in with ContaShare)
- https://contashare.com/help/webhooks — Webhook setup and payload documentation
- https://contashare.com/docs/api — OpenAPI / API reference
- https://contashare.com/cookies — Cookie policy
- https://contashare.com/privacy-policy — Privacy policy
- https://contashare.com/terms-of-service — Terms of service

## Optional

- llms-full.txt: Not published; this file is the canonical machine-readable summary for ContaShare
- Last updated: 2026