EU · UK · US · live public-procurement intelligence

Win more public contracts, with far less work.

I started TenderStack as a bid-writer. I was sick of checking a dozen procurement portals every morning — TED, the national sites, the UK ones — terrified I'd miss the one contract we could actually win. And when I tried ChatGPT, it would happily invent a deadline or miss half the notices.

So I built the tool I wished I'd had: one place that reads every official source itself, matches tenders to what you actually do, and tells you the moment something fits — so you never miss the bid that mattered.

Alex de RuiterFounder, TenderStack · ex bid-writer

Try it live — no account needed

Live sample of recently-published tenders · full search & scouting in Claude & ChatGPT

Start for free Open the web app → How to install

— tenders tracked since 2023 — and counting

Why teams switch

Stop missing tenders you'd have won

Most companies see a fraction of the contracts they're eligible for — the rest hide in portals they don't check, in languages they don't read, below the thresholds the big aggregators ignore. TenderStack closes that gap.

Never miss a winnable tender

One search covers every market — EU (all 27 via TED), UK, Netherlands, Belgium, Germany, France and the US — above and below threshold. The smaller, less-contested contracts that aggregators skip are exactly where you win.

1.5M+ notices7 markets

Match on what you do — not CPV codes

No memorising 9,500 procurement codes. Describe your business in plain words and AI surfaces the relevant tenders by meaning, in any language — "helping people back to work" finds the right contract whether it's posted in Dutch, German or French.

semantic matchplain-language tags

Know who you're up against

Award data on closed tenders shows who won and for how much — so you can spot the incumbent, read the price-to-win, and decide where you actually have a shot. Competitive intelligence across every market, back to 2023.

who-wonaward values

Get re-tender leads first

Every contract expires eventually — and that's your opening. TenderStack forecasts contracts coming up for renewal so you can build relationships and position months before the notice drops.

expiry forecastincumbent to beat

Qualify in minutes, not days

A plain-English summary on every tender, automatic eligibility checks against your profile, and one-click fetch of the full solicitation documents (with OCR) — so you reach a confident go / no-go fast and stop burning time on dead ends.

AI summarieseligibilitydoc Q&A

A scout that works while you sleep

Set your profile once and TenderStack checks every market for you — daily. New matches come to you, in the tools your team already lives in. No portal to remember to open.

daily scoutingmulti-channel alerts

Proactive watch

The market watches itself — and pings you where you work

Searching is the old way: you have to remember to look. TenderStack flips it. Describe what you win once — your services, regions, thresholds, even your go/no-go rules — and it scans every EU, UK and US source on a schedule. The moment a tender matches, it lands in your team's inbox, Teams, Slack or WhatsApp, already scored and screened. You react to opportunities instead of hunting for them.

Email digest

A clean daily brief of new matches — per saved profile

Microsoft Teams

Posts straight to your channel via an incoming webhook

Slack

New matches drop into the channel your bid team watches

The urgent ones reach you on your phone, wherever you are

Claude & ChatGPT

Or just ask “what's new for me?” any time

Scored on arrival

Each match carries an AI relevance read + 🟢/🟡/🔴 go/no-go against your own criteria

Run several watches at once — one per service line or country — each with its own criteria and its own channel. It's the difference between a tool you open and a teammate that tells you when it matters.

In Claude & ChatGPT

Guided skills for the whole bid lifecycle

Beyond search, TenderStack ships expert skills that activate inside Claude and ChatGPT — so the same assistant that found the tender can help you research, qualify and plan the bid. These run in the chat, not the web app.

Find & Qualify

Score every opportunity against your company profile before committing resources — pull the full solicitation documents (with OCR) for go/no-go.

opportunity-discoverybid-qualification

Capture

Build your win strategy before the RFP drops. Research the agency, map the competition, define your discriminators, and plan teaming.

capture-planningcompany-profile

Analyze

Bring any RFP/RFQ/IFB into the chat. Extract the Section L/M/C requirements, build a compliance matrix, and flag every risk before you respond — including a cited legal read with the Legal Assistant.

solicitation-analysiscontract-analysislegal-advisor

Plan

Map out a full response plan — volume structure, section ownership, colour-team schedule, milestones and effort estimates — so the team knows exactly what to produce.

bid-planningpipeline-management

Price & Position

Work through pricing strategy and price-to-win thinking against the evaluation criteria — draft cost reasoning, labour categories and competitive positioning, right in the conversation.

pricing-commercial

Review

Pressure-test a draft with Pink/Red/Gold-Team-style review and evaluator scoring, and build the compliance checklist — so you catch gaps before the deadline.

quality-reviewchecklist-filling

Learn & Improve

Process win/loss debriefs, capture lessons learned, track KPIs, and build a reusable knowledge base that makes every next bid sharper.

post-bid-analysisknowledge-management

Add-on · Legal Assistant

A procurement lawyer reading over your shoulder

Public procurement is governed by statute, regulation and a deep body of case law — and the rules differ in every country. The Legal Assistant module reads the live tender against the actual law of its jurisdiction and flags issues before they cost you the bid: disproportionate selection criteria, unlawful eligibility requirements, missing motivation, deadlines that breach the directive. Every flag carries a citation to the primary source — never an invented rule.

Check a tender

Point it at any live tender and get a 🟢/🟡/🔴 read on the selection criteria, award method and timelines against the governing law — grounded in the statute and the relevant decisions.

legal-check

Ask the law

"Is a €5m turnover requirement proportionate for a €400k contract?" Get the answer with the article, the directive and the case law that settles it — in plain language, in the chat.

legal-search

Build your challenge

Considering a complaint to the review body? Surface comparable rulings from the national appeals board and the CJEU so you know where you stand before you file.

case-law

What's in the corpus

A continuously-refreshed legal layer over official primary sources — statutes, EU directives, contract law, advisory opinions and the decisions of national procurement-review bodies and the Court of Justice of the EU.

Procurement statutes · 27 jurisdictions EU directives 2014/23·24·25 Case law · 20+ jurisdictions CJEU rulings NL advisory opinions & Gids Proportionaliteit Refreshed continuously

Coverage spans the EU (incl. NL, DE, FR, ES, IT, BE, AT, IE, PL, CZ, DK, SE, FI, GR, RO, SI, EE, HR, CY, MT), the UK and the US, and grows over time. The Legal Assistant is informational support — it surfaces and cites the law; it is not a substitute for advice from a qualified lawyer.

Data you can trust

Straight from the official source

No scraping, no stale third-party feeds, no black box. TenderStack reads directly from official public registers and open data — refreshed every 8 hours, with history back to 2023 — so the intelligence you bid on is current and verifiable.

TED — EU

EU-wide tenders, all 27 member states

Find a Tender — UK

UK above-threshold tenders

Contracts Finder — UK

UK below-threshold contracts

TenderNed — NL

All Dutch tenders, incl. national

e-Procurement (BDA) — BE

Belgian tenders, incl. below-threshold

oeffentlichevergabe.de — DE

German tenders, incl. below-threshold

BOAMP — FR

French tenders & awards

SAM.gov + Grants.gov — US

US federal contracts & grants

USASpending / FPDS — US

US award & spending history

See it in action

From search to winning proposal — in one conversation

Real output from TenderStack running inside Claude. No demos, no mockups.

Live opportunity search results with urgency indicators

Live opportunity discovery Real-time RFP from SAM.gov with urgency flag, NAICS, set-aside type, and deadline — pulled live.

Weighted bid/no-bid scoring across 6 criteria

Weighted bid/no-bid scoring Every opportunity scored across 6 criteria — keyword match, geographic fit, set-aside eligibility, past performance, competitive position, and deadline feasibility.

GO / NO-GO recommendation with next steps A clear pursuit decision with risk factors, competitive context, and concrete recommended actions before committing.

Technical approach proposal section being written

Proposal writing — Section L aligned Full technical approach drafted to spec, with win themes, solution methodology, and CPARS-aligned past performance narrative.

Get started

Works with Claude & ChatGPT

One API key, two platforms. Pick whichever AI you already use.

Claude

Create a free account at tenderstack.io/signup and copy your sk_tdb_… key.

Add the MCP integration

In Claude.ai → Settings → Integrations → Add integration, paste your MCP URL: https://mcp.tenderstack.io/sse?key=sk_tdb_…

Start bidding

TenderStack's 19 skills activate automatically. Just describe what you need in plain English.

ChatGPT

Same key works for both platforms. Create a free account at tenderstack.io/signup.

Open the TenderStack GPT

Find TenderStack in the ChatGPT GPT Store, or go directly to TenderStack GPT.

Enter your API key

Start a conversation and enter your sk_tdb_… key when prompted. The same 19 skills and 14 data sources are available.

Pricing

One won contract pays for years

Start free, no card required. Upgrade when TenderStack is already earning its keep. Cancel anytime.

Free

200 actions / month (searches + skills)
Full EU · UK · US coverage
AI matching & summaries
You search, when you remember to

Get started free

Built on a decade of winning tenders

TenderStack is built by LemonB BV, a certified tender-management company with 10+ years of hands-on experience winning bids across Europe and the US. We've run hundreds of procurement cycles — from pre-solicitation strategy through award — and encoded that expertise into the product.

TenderStack is the open front door to our wider platform, TenderB — and the two play very different roles:

TenderStack · the intelligence layer

Find, qualify and draft against every public tender across the EU, UK & US — from inside Claude, ChatGPT or any AI agent. Discovery, who-won data, scouting and proposal drafting, API-first. Nothing to log into.

TenderB · the full platform

The complete bid-management brain — a modular workspace where your team runs the entire tender lifecycle: every source ingested, a collaborative AI writing canvas, a configurable workflow engine, jurisdiction Skills (NL · DE · UK), approvals, audit trail and memory that learns your win/loss patterns.

Visit TenderB ↗

Start in TenderStack to discover and act on opportunities today; graduate to the full TenderB workspace when you're ready to run bids end-to-end.

"Can't I just write my bid in Claude or ChatGPT?"

A general-purpose model writes fluent prose — and will confidently invent the regulation, threshold or citation that gets you disqualified. Winning public tenders isn't a writing problem; it's a compliance, evidence and memory problem. That's the part a raw chatbot can't do — and exactly what TenderB is built for:

Jurisdiction expertise, not guesswork

TenderB's NL · DE · UK Skills are curated and continuously evaluated against real procurement law, with citations to source. A generic model hallucinates the rule it can't cite.

Your institutional memory

It writes in your organisation's voice, reuses your proven, won answers, and learns your win/loss patterns. ChatGPT starts from a blank page every single time.

Compliant by construction

EU data residency, a full audit trail and ISO 27001. You cannot drop a confidential RFP into a consumer chatbot and stay compliant — your bid team can't risk it.

Quality gates before it ships

Every customer-bound output passes hallucination filters and human-in-the-loop checkpoints. No surprises in front of an evaluator who can disqualify you for one wrong claim.

TenderStack puts live opportunity intelligence in the chatbot you already use. TenderB is where that intelligence becomes a compliant, on-brand, evidence-backed bid you can actually submit.

view certificate ↗

10+

Years tender experience

500+

Bids managed

Expert skill workflows

FAQ

Finding public tenders with AI — the common questions

How can I search public tenders in ChatGPT or Claude?

Connect TenderStack. In Claude, add the MCP server at https://mcp.tenderstack.io/sse; in ChatGPT, use the TenderStack GPT. You can then ask in plain English for live public tenders, contract awards and grants across the EU, UK and US — and get AI summaries, who-won data and re-tender forecasts.

What is the best AI tool to find government tenders and RFPs?

TenderStack is an AI-native public-procurement tool that works inside Claude, ChatGPT and a web app. It covers every public tender across the EU (all 27 member states via TED), the UK, Netherlands, Belgium, Germany, France and the US — above and below threshold — with semantic search, so you match on what your company does rather than memorising CPV codes.

Can I find EU and UK tenders below threshold?

Yes. TenderStack includes below-threshold tenders for Germany, the Netherlands, Belgium, the UK, France and the US, plus all above-threshold EU tenders via TED — over 1.5 million notices, refreshed every 8 hours, with history back to 2023.

How do I see who won a public contract?

TenderStack stores award data on closed tenders, including the winning supplier and award value where published, so you can analyse incumbents and price to win.

Is there a free way to search public procurement with AI?

Yes. TenderStack has a free plan with 200 actions per month; Pro ($49/month) is unlimited. It works in Claude, ChatGPT and the web app at app.tenderstack.io.

Which countries and sources does TenderStack cover?

EU-wide via TED (all 27 member states), the UK (Find a Tender and Contracts Finder), the Netherlands (TenderNed), Belgium (e-Procurement/BDA), Germany (oeffentlichevergabe.de), France (BOAMP), and the US (SAM.gov, Grants.gov, USASpending, FPDS and more).