Live call demo
Prospects can hear the agent on their own phone before creating an account.
SellSea / Live product / 2026
SellSea
An outbound AI voice platform that turns a sales brief into real, reviewable conversations.
Visit the live product- Contribution
- Strategy, identity, product design and engineering
- Delivery
- Marketing site, SaaS product, API and voice agent
- Status
- Live at SellSea.ai
The opportunity
A sales platform that makes its own first call.
Outbound work often breaks across prospecting tools, spreadsheets, diallers and handwritten follow-up. SellSea was designed as one operating loop: define how the agent should represent the business, give it the right contacts, run the calls and make every outcome useful to the human team.
Proof before signup
Let people hear the product, not just read the promise.
Trust is the hardest part of an AI calling product. The public experience therefore centres on a real call-me demo. A visitor enters a verified UK or Spanish mobile number, receives a call and hears the qualification flow on their own phone.
That interaction turns an abstract technical claim into a direct product experience before asking for an account or card.
The product loop
One path from a prospect list to the next useful action.
The interface hides a multi-service system behind five clear stages. Configuration stays as data, so every organisation can deploy its own sales agent without rebuilding the voice worker.
- 01
Find or import
Build a prospect list in-product or bring an existing CSV into the workspace.
- 02
Configure the agent
Set the spoken name, company context, pitch, goal and qualifying questions.
- 03
Run the campaign
Choose the contacts, calling window and schedule, then start or pause the work.
- 04
Hold the call
The voice worker listens, responds and keeps the conversation moving in real time.
- 05
Review the outcome
Each call returns a transcript, summary, outcome and clear next action.
The experience
Make the work visible at every stage.
Campaign status, live notifications, scheduled work and call outcomes use the same compact visual language. The product should feel calm while a complex system is working underneath.
Identity system
A signal that feels active without becoming noisy.
The mark is built from offset strokes that read as voice, movement and exchange. Electric blue creates an immediate product signal, while deep navy and pale cyan give the system enough range for operational screens and expressive marketing.
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What shipped
More than a polished voice demo.
The work spans the customer-facing experience and the less visible systems needed to run it safely as a multi-tenant SaaS product.
Agent builder
Business context and scripts are stored as versioned workspace configuration.
Prospect Finder
Search, enrich and promote relevant companies into the sales workflow.
Campaign operations
Import contacts, dispatch calls and track progress from one working view.
Call intelligence
Transcripts, summaries and outcomes make every conversation reviewable.
Operational controls
Calling windows, plan limits and organisation-owned caller IDs constrain dispatch.
Usage and billing
Stripe subscriptions and a minute ledger connect product access to real usage.
Workspace model
Organisations, memberships and permissions keep product data tenant-specific.
Built through to production
Design decisions carried into the real system.
SellSea is built as a TypeScript monorepo. React powers the public site and authenticated product, Express and PostgreSQL manage product data, and a stateless LiveKit worker receives each call's configuration at dispatch.
That architecture keeps the voice engine reusable while the agent's identity, script, contact and business context remain specific to each workspace and call.
- React 19 and Vite
- Express and TypeScript
- PostgreSQL and Prisma
- LiveKit voice agents and SIP
- Stripe billing and usage metering
- Sentry and structured logging
The result
A live product that can introduce itself, make the call and show the work afterwards.
Experience SellSea