Watch Bidwin turn a live tender pack into an evidence-cited first draft. See the full demo →

Win more bids.
Draft your first response in hours, not days.

Bidwin Core is your own AI bid-drafting system, built around your documents, evidence and winning style. Grounded in a Bid Professional's method.

See how it works

Buy, install and start drafting the same day · 30-day money-back guarantee

Bid drafting is time pressured and highly competitive.

Too much documentation

Every bid/tender adds piles of schedules, policies, and scoring criteria before a word is even written.

Judgement still matters

Generic AI drafts quickly, but doesn't protect your data or IP, and can produce slop, hallucinate or invent evidence and miss scoring criteria.

Competitors using AI

The question is no longer "should we use AI?" The risk is falling behind rival teams that already do.

A controlled bid drafter built from your own documents.

Not generic AI. Not another SaaS platform.

1

Download the tender pack

Save the instructions, schedules, questions and scoring criteria into your project folder.

2

Add your evidence

Reports, case studies, accreditations, endorsements, awards, policies, method statements.

3

Show it what good looks like

Your past winning bids, house style and tone of voice, or, if you're starting fresh, Bidwin helps you build them.

4

Get structured first drafts

Section by section, evidence-cited and mapped to the scoring criteria.

A guided setup walks you through it the first time, and it all stays in your own professional Claude account, on your own computer.

Keep your AI bid drafter on a leash.

Evidence-only drafting Flags and fills gaps in responses Scoring-criteria aware
Free for founding members · £199/year value

Your next contract is already out there. Let Bidwin Watch find it.

Watch scans the live UK tender portals, scores each opportunity against your own evidence, and tells you which are genuinely worth bidding for. The perfect partner to Core: it finds the bid, Core wins it.

Explore Bidwin Watch →

Included with every Core licence

Mark Cosens FRSA MA FIEP, Founder of Bidwin-AI and Professional UK Bid Manager

Mark Cosens

FRSA · MA · FIEP

LinkedIn Profile
The expert behind Bidwin-AI

Real bid expertise, built in and available to you.

Bidwin-AI was created by Mark Cosens, a specialist bid and tender professional who has helped clients win over 150 million pounds in contracts across the public, charitable and private sectors. Every workflow, prompt structure and drafting method inside Bidwin is grounded in Mark's hands-on practice.

"We built Bidwin-AI to be affordable. Any bid team can use the same disciplined, evidence-led approach I've refined, over years of winning, without needing weeks to set up."

Need a hand on a live bid? Mark's expert support and managed bid service are available, arranged case by case. The plugin gets you drafting today; the expert help is there when a bid calls for it.

Founding Member pricing · limited places

Join as a founder. Lock in your price for good.

We're onboarding a limited group of founding clients. Join now and your licence stays at £349 a year. You keep that rate at every renewal, even after the standard price would have moved up to £499.

The core product

Bidwin Core Service

Your own bid-drafting system, one licence per Bid Professional.

£349 / year · per user £499
Founder rate, renews at £349

Founding bonus: Bidwin Watch free, the tender opportunity finder, £199/year £0. What's Watch?

The full Bidwin plugin: tender vetting, section drafting, evidence checks and pre-submission quality control Bidwin Watch tender opportunity finder, free for founding members Self-service onboarding: set up each new tender yourself, no waiting on us A guided tender setup, included: we walk you through the process one-to-one and get you drafting with confidence, so starting out never feels daunting Email support and every update for 12 months Runs inside your own Claude Pro account, your data stays yours

Buy, download and install today. You're drafting the same day, no account to create.

30-day money-back guarantee · no auto-renewal

Requires your own Claude Pro subscription (around £18/month, billed by Anthropic).

No subscription trap. Your £349 is an annual licence: a full year of the plugin, updates and support. There's no auto-renewal. Stop whenever you like and you keep the version you already have; renew only to keep updates and support coming. And if it's not for you, our 30-day money-back guarantee has you covered. Each licence is for one Bid Professional. If your whole team needs the same company-tuned version, we can build that bespoke for you.

Add expert power when a bid needs it.

Optional services on top of your Core licence, arranged case by case, use them only when you want them.

Guided Bid/Tender Setup

£50 / tender

Your Core licence lets you set up each tender yourself. New to it, or would rather have a hand? We'll guide you through the process one-to-one and get you drafting with confidence. One is included free with your founder plan.

Bespoke Skill Development & AI Coaching

Priced on enquiry

Custom skills built around your workflow, plus one-to-one AI coaching so your team gets more from Bidwin and from Claude.

Bid Consultant Support

Priced on enquiry

Hands-on help from Mark Cosens: review of your draft responses, response plans, evidence gaps and overall quality. Prefer it fully done for you? Ask about the managed bid service.

For comparison, traditional bid-writing firms typically charge £3,000–£6,000+ per tender. Bidwin gives you the same professional discipline at a fraction of the cost, with control staying in your team.

Common questions

What is Bidwin Core?

Bidwin Core is an AI-powered drafting tool. It generates structured, evidence-cited first draft bid responses based on your own tender documents, evidence files and writing style, not generic AI output.

Can I use an AI tool like Claude or ChatGPT for bid writing?

Generic AI tools like Claude and ChatGPT can draft text, but they can compromise your data and intellectual property, and they lack your evidence files, bid history, and scoring-criteria awareness. Bidwin-AI solves this by building a custom drafting system inside your Claude account, grounded in your own documents so every draft is built on real evidence, not hallucinated content.

How quickly can I start?

Immediately. You buy online, download the plugin and guide, install it in your own Claude account and begin drafting the same day. Set everything up yourself. Just contact us if you get stuck. We're here to help.

What is Bidwin Watch, and is it really free?

Bidwin Watch is our tender opportunity finder. It scans the UK public-sector portals, scores each live opportunity against your own evidence, and tells you what is worth bidding. For a limited time, founding members receive it free (normally £199 a year). See the Bidwin Watch page →

Do I need anything else?

Your own Claude Pro account (around £18/month, billed by Anthropic) runs Core. Bidwin Watch also uses Google Chrome with the free Claude extension, because it reaches the live tender sites for you. Your guides walk you through both.

Founding places open now

Start winning more bids today.

Get Bidwin Core at the founder rate, with Bidwin Watch free for founding members. Buy, install and draft the same day.

By buying you accept our Licence & Terms of Use.