What tools do UK angel investors actually use?

The tools for angel investors that turn up most. Tero for diligence, monitoring and reliefs. AngelTrack for founder updates and documents. SeedLegals for Investors where the companies raise there. Haatch's EIS Traaker for a relief log. Dealum inside a network. ChatGPT or Claude on the deck.

Can ChatGPT or Claude do due diligence on a UK startup?

They read what you paste and what they can search, and they reason well over it. They do not read Companies House filings, the FCA register, sanctions lists or the courts unless you fetch those yourself, and their answers do not link to filed documents. Use them for questions about a deck. They do not verify.

Is there one tool that does everything for an angel investor?

Nearly. Tero covers holdings, diligence, reliefs and the integrations from the register, and founders can pitch you through your Tero link, but there is no update channel. AngelTrack covers updates and documents but reads nothing and runs no diligence. Most angels pair one of each.

How much do these tools cost for an individual angel?

At the time of writing: Tero is free, then plans from £10 a month. Haatch's EIS Traaker is free. AngelTrack costs £25 a month after a 90-day trial. Dealum's investor plan is €33 a month. SeedLegals membership is £499 a year. Startup Due Dil's angel plan is $449 a month.

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The best tools for angel investors in the UK (2026): one place for the whole job

Tero team

The team behind Tero

6 min read

Updated 10 September 2026

ToolsDue diligence

Key takeaways

An angel has four jobs, and most tools do one. Track the holdings, run the diligence, keep the reliefs, talk to the founders. Score a tool on all four before you pay for it.
Most of the market serves funds. Beauhurst, Visible, Rundit and Harmonic sell to investment teams. The individual angel is left stitching a spreadsheet to a chat window.
AI earns its place on the diligence job. Reading a year of filings, the courts, sanctions lists and the founders' histories is an evening by hand. A model that reads the register does it in minutes, with citations.

Tero for angel investors

Let AI do the checking, then keep watching

Run due diligence on any UK company. Nine AI agents read the registers, the courts and the founders' histories. Every figure cited.
Add a holding to monitoring. Every filing on it, the week it lands, with what it means for your stake.
Upload your EIS and SEIS spreadsheet. Export it as CSV. Tero maps the columns, starts every clock and chases the certificates.

Companies HouseFCAGazetteCourtsSanctions

Check a company free

First report free, then plans from £10 a month. Descriptive verdicts, never a recommendation.

A good angel holds twenty or more companies. Each one files accounts, raises again, changes its board, and sometimes dies without writing to anyone. Each cheque came after a decision that deserved an evening of checking. Each holding carries EIS or SEIS paperwork with its own clocks. And every founder needs a reply now and then. That is the job. The tools for angel investors on the market mostly do one part of it. This guide sets out the four parts, then scores seven tools against them, plus the integrations behind the work and the price. Tero is ours and sits the same tests as everyone else.

#	Tool	Portfolio monitoring	Due diligence	EIS & SEIS tracker	Founder contact	Integrations	Price	Score
1	Teroours	AI: filings, news, dilution	AI: registers, founders, market	Clocks, certificates, pack	Deal inbox via your pitch link	Companies House, Semrush	Free, then £10 a month	9.2/10
2	AngelTrack	Your entries and founder updates	None	Tax forms, no clocks	Updates, events, documents	None advertised	£25 a month	4.2/10
3	SeedLegals for Investors	SeedLegals companies only	None	Certificates on platform	Company side only	Its own cap tables	£499 a year	4.2/10
4	EIS Traaker by Haatch	None	None	Manual log, relief calculated	None	None	Free	3.3/10
5	Dealum	What members enter	Screening by the group	None	Within the network	None	€33 a month	2.5/10
6	ChatGPT and Claude	None	Over what you paste	None	None	Web search, no registers	About £20 a month	2.5/10
7	Startup Due Dil	None	AI on documents only	None	None	Public web	$449 a month	1.7/10

Full Partial NoneHow the score is built: 6 tests, each scored full (2), partial (1) or none (0): portfolio monitoring in one place, with news; due diligence on new startups, with founder background and market checks; EIS and SEIS relief tracker; communication with the startups; integrations: Companies House, FCA, Semrush and the other sources; priced for an individual angel. Points out of 12, shown out of ten. Tero is ours and sits the same tests. It scores half on founder contact: founders can pitch you through your Tero link, and there is no update channel. Prices as at September 2026.

1Teroours9.2/10

Portfolio monitoring:: AI: filings, news, dilution
Due diligence:: AI: registers, founders, market
EIS & SEIS tracker:: Clocks, certificates, pack
Founder contact:: Deal inbox via your pitch link
Integrations:: Companies House, Semrush
Price:: Free, then £10 a month

2AngelTrack4.2/10

Portfolio monitoring:: Your entries and founder updates
Due diligence:: None
EIS & SEIS tracker:: Tax forms, no clocks
Founder contact:: Updates, events, documents
Integrations:: None advertised
Price:: £25 a month

3SeedLegals for Investors4.2/10

Portfolio monitoring:: SeedLegals companies only
Due diligence:: None
EIS & SEIS tracker:: Certificates on platform
Founder contact:: Company side only
Integrations:: Its own cap tables
Price:: £499 a year

4EIS Traaker by Haatch3.3/10

Portfolio monitoring:: None
Due diligence:: None
EIS & SEIS tracker:: Manual log, relief calculated
Founder contact:: None
Integrations:: None
Price:: Free

5Dealum2.5/10

Portfolio monitoring:: What members enter
Due diligence:: Screening by the group
EIS & SEIS tracker:: None
Founder contact:: Within the network
Integrations:: None
Price:: €33 a month

6ChatGPT and Claude2.5/10

Portfolio monitoring:: None
Due diligence:: Over what you paste
EIS & SEIS tracker:: None
Founder contact:: None
Integrations:: Web search, no registers
Price:: About £20 a month

7Startup Due Dil1.7/10

Portfolio monitoring:: None
Due diligence:: AI on documents only
EIS & SEIS tracker:: None
Founder contact:: None
Integrations:: Public web
Price:: $449 a month

Full Partial NoneHow the score is built: 6 tests, each scored full (2), partial (1) or none (0). Points out of 12, shown out of ten. Tero is ours and sits the same tests. It scores half on founder contact: founders can pitch you through your Tero link, and there is no update channel. Prices as at September 2026.

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Teroours

AI due diligence, monitoring and reliefs from the filed record

9.2/10

11 of 12 points

Give it a company name, a website or a deck. Tero builds an evidence pack from Companies House, the FCA register, sanctions lists, The Gazette, court judgments, web traffic and the live web. Nine AI research agents run over it in parallel, one per module, then a second agent challenges each claim before the report states it. Every figure links to its source. After the cheque, the same engine watches every filing on every holding, prices the dilution from the SH01, and runs the EIS and SEIS clocks. Founders can pitch you through your Tero link; there is no update channel.

Holdings: Watched from the register, unlimited on the top plan
Diligence: Nine AI agents plus a sceptic: registers, founders, market, competition
Reliefs: Clocks, certificates, accountant pack

For

Powered by AI agents: nine researchers and a sceptic on every report
Three of the four jobs in one place
Reads what the company filed, and cites it
Priced for one person

Against

No founder-update channel, only a pitch inbox
UK only
A report takes about fifteen minutes

Check a company free See an example report →

Sources, checked 10 September 2026: tero.capital/pricing; example report

AngelTrack

Portfolio record with the founder in the loop

4.2/10

5 of 12 points

A UK app built by two angels, David Pearce and Darren Shaw. Rounds and investments logged, documents and tax forms stored against each holding, confidential updates and event scheduling with founders and co-investors. Free for founders, so they turn up. It knows what you and the founders type in. It does not read the register and runs no diligence.

Holdings: Your entries and founder updates
Diligence: None
Reliefs: Tax forms stored; no clocks

For

Founder communication built in
UK, priced for an individual
Document store per holding

Against

Does not read Companies House
No due diligence
Relief clocks are yours to compute

Sources, checked 10 September 2026: angeltrack.app/plans; angeltrack.app/about-us

SeedLegals for Investors

The cap table you already sit on

4.2/10

5 of 12 points

If your companies raise through SeedLegals, their cap tables live there. The investor membership gives you current shareholdings, exit modelling and the certificates issued on the platform. Complete for those companies, blind to the rest, and silent on any company you have not yet backed.

Holdings: Companies on SeedLegals only
Diligence: None
Reliefs: Certificates issued on the platform

For

Real shareholdings, not estimates
Certificates already in place
Exit modelling

Against

Only companies on SeedLegals
No diligence on new opportunities
£499 a year for a partial view

Sources, checked 10 September 2026: seedlegals.com/investors/pricing

EIS Traaker by Haatch

A free personal relief record

3.3/10

4 of 12 points

Built by the EIS fund manager Haatch. Log each investment with company, share class, shares, HMRC references and fund; record certificate status, compliance-statement dates and carry-back elections. It calculates the relief and shows the three-year qualifying period. One job, done neatly, entirely by hand.

Holdings: What you type
Diligence: None
Reliefs: Relief calculated, periods shown

For

Free
Fast to set up
Carry-back and certificate status recorded

Against

Relief only
Manual entry
A dissolution is invisible until you enter it

Sources, checked 10 September 2026: traaker.haatch.com; App Store listing

Dealum

Software for angel networks

2.5/10

3 of 12 points

Deal-flow, application funnels and a portfolio module for angel groups and accelerators. If your syndicate runs on Dealum you get its pipeline and a shared record of what members enter. The portfolio module records; it does not watch the register, and there is no diligence engine.

Holdings: What members enter
Diligence: None; screening by the group
Reliefs: None

For

Group pipeline in one place
Reasonable individual plan

Against

A record of what members type
No register reading
Network first, individual second

Sources, checked 10 September 2026: dealum.com/pricing/investor; dealum.com/pricing

ChatGPT and Claude

A reasoning partner for the deck

2.5/10

3 of 12 points

Paste the deck and ask: is the market-size claim consistent, what does the cap table imply, what would you ask the founders. Both reason well over long documents. Neither reads Companies House, the FCA register or the courts unless you fetch the documents yourself, and neither links a figure to a filing. Nothing is tracked after the conversation ends.

Holdings: None
Diligence: Over what you paste; no register
Reliefs: None

For

Excellent at questions and structure
Cheap and immediate

Against

No register access
No citations to filed documents
No memory of your portfolio

Sources, checked 10 September 2026: openai.com/chatgpt/pricing; claude.com/pricing

Startup Due Dil

Ten agents over the deck

1.7/10

2 of 12 points

Ten AI agents read a pitch deck, supporting documents and public sources and return a structured report in about ten minutes. Built mainly for VC and PE firms, with an angel plan on the side. It reads what you give it and skips the UK register, and it does nothing after the report.

Holdings: None
Diligence: AI over your documents and the web
Reliefs: None

For

Fast structured output
Handles the deck well

Against

No UK register depth
$449 a month for the angel plan
No monitoring, no reliefs

Sources, checked 10 September 2026: startupduedil.com

What UK angel investors need from their tools

One place to track every holding. Twenty positions across four tax years means twenty filing histories to watch. The confirmation statement shows your percentage. The SH01 shows the next round and your dilution. The Gazette shows the strike-off. An angel wants the news on each company, the progress since the cheque, and what each event means for their stake, without opening Companies House twenty times.

One tool to run due diligence, ideally powered by AI. Before the cheque: the register, the filed valuation against the pitched one, the FCA register if the business claims a regulated activity, sanctions lists, court judgments, and a background check on each founder's other companies. Done by hand this is most of a day, which is why most angels check two sources or none. This is the job where AI earns its place, provided it reads the primary record and cites it.

One tool to track EIS and SEIS reliefs. Certificates to chase, a claim window that closes, a three-year clock that claws the relief back, a two-year clock for inheritance tax, and a loss-relief deadline that runs whether or not you noticed the company had died. See the best EIS trackers for that job on its own.

One channel to the startups. Founder updates, documents, the occasional introduction. Angels who invest through a network get this from the network. Angels who invest alone get it from email, or from nothing.

The gap in the market

Plenty of software serves institutional investors. Beauhurst lists the UK data from £24,500 a year on its public-sector price list. Visible collects founder updates for over 950 funds. Rundit builds LP reports. Harmonic and Specter feed sourcing teams. None of it prices for a person writing £25,000 cheques, and none of it covers the four jobs above together. The individual angel is left with a spreadsheet, a chat window, a folder of PDFs and a habit of checking Companies House on Sunday night. What they ask for, when you ask them, is one place.

Six tests

Portfolio monitoring in one place, with news. Every holding, the filings and the press on each, and what each event means for your stake, without you typing it in.

Due diligence on new startups. The filed round, the ownership, the founders' other companies, the FCA and sanctions checks, the market and the competition, with the source of each figure shown.

EIS and SEIS relief tracker. Certificates, claim windows, the three-year and two-year clocks.

Communication with the startups. A way for founders to reach you, and for updates and documents to flow.

Integrations. Whether the tool reads Companies House, the FCA register, The Gazette, the courts, sanctions lists and market data such as Semrush, or only what you paste in.

Priced for an individual angel. Free or a few pounds a month, without a team licence.

Each test scores full, partial or none. Twelve points is a tool that does the whole job for one person.

Where the tools for angel investors stop

Three things no tool changes. You claim relief on your own tax return, and it depends on your circumstances. Advance assurance belongs to the company. And a clean check is a finding. It guarantees nothing: most private companies publish very little, and the skill is separating "not disclosed" from "contradicts the pitch". Information, not investment or tax advice.

From the register

See it on a real filing history

Three UK companies whose priced rounds Tero has read from Companies House, with implied valuation at each allotment.

All company pages →

Questions this guide answers

What tools do UK angel investors actually use?: The tools for angel investors that turn up most. Tero for diligence, monitoring and reliefs. AngelTrack for founder updates and documents. SeedLegals for Investors where the companies raise there. Haatch's EIS Traaker for a relief log. Dealum inside a network. ChatGPT or Claude on the deck.
Can ChatGPT or Claude do due diligence on a UK startup?: They read what you paste and what they can search, and they reason well over it. They do not read Companies House filings, the FCA register, sanctions lists or the courts unless you fetch those yourself, and their answers do not link to filed documents. Use them for questions about a deck. They do not verify.
Is there one tool that does everything for an angel investor?: Nearly. Tero covers holdings, diligence, reliefs and the integrations from the register, and founders can pitch you through your Tero link, but there is no update channel. AngelTrack covers updates and documents but reads nothing and runs no diligence. Most angels pair one of each.
How much do these tools cost for an individual angel?: At the time of writing: Tero is free, then plans from £10 a month. Haatch's EIS Traaker is free. AngelTrack costs £25 a month after a 90-day trial. Dealum's investor plan is €33 a month. SeedLegals membership is £499 a year. Startup Due Dil's angel plan is $449 a month.

Tero runs these checks automatically.

Twelve sources, one gateway. Diligence in minutes, monitoring forever.

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