Seisly Investor Network
Founders come to Seisly for advance assurance, which happens months before they raise. Membership gives you sight of that flow at the earliest stage, the signal underneath it, and the screening tools to sort it.
Membership
£49
a year
Founding member rate, held for as long as your membership runs while the network is being built.
Deal flow
opted-in companies at advance assurance stage
Included
Deal analyser
unlimited decks, yours or ours
Included
Market signal
aggregated from application flow
Included
Our cut of your deals
Nothing
No carry, no success fee, no introduction commission. The membership fee is the whole commercial relationship.
The situation
Early-stage deal flow arrives late and pre-sorted. A founder raises, a deck circulates, and by the time it lands in your inbox the round is half-committed and the terms are set. The investors who do well at this stage are the ones who saw the company before it was a deal.
Advance assurance sits earlier than that. Founders apply for it while they are preparing to raise, typically months ahead of the first investor meeting, because they need HMRC's view before investors will commit. Seisly processes those applications.
That makes advance assurance one of the earliest structured signals in the UK early-stage market, and it is where the Investor Network sits.
What reaches the network
A founder comes to Seisly for advance assurance, not to be listed to investors. Nothing about a company reaches the network unless the founder has actively chosen to be visible. That constraint costs us flow, and we keep it, because the alternative is a platform founders learn not to trust.
You see
You do not see
Anything from a founder who has not opted in. No application content, no eligibility output, no contact details, and no company that came to Seisly and chose to keep its raise private.
The deal analyser
Upload a pitch deck and the analyser separates what the deck asserts from what an authoritative source actually confirms. The distinction it holds throughout is the useful one. Verified means a named source says so and the citation is there to follow. Unverifiable means no external source holds the claim, which is a different thing from false, and it is said plainly rather than dressed up.
Claim ledger
Every material claim in the deck, extracted and tested. What was said, what the source shows, and what that means, kept in separate columns so inference never wears the clothes of evidence.
Companies House verification
Identity, incorporation, status, trade and prior names checked against the register, with the record cited. Prior names carry more than people expect: a decade of pedigree can belong to a company that changed its name last year.
Self-consistency check
The deck tested against itself. Market maths that does not reconcile, figures that move between slides, penetration computed on one base and labelled as another.
Completeness test
What is present, and what is missing before the round can be priced at all. A deck with no pre-money and no equity figure cannot be assessed, and the analyser says so rather than working around it.
SEIS and EIS read
An eligibility view against the objective statutory limits, from the team that has been filing advance assurance since 2012.
Cited sources, always
Nothing is marked verified without a citation you can follow. If the source cannot be resolved, the claim is not treated as verified. That rule is enforced in the software, not left to judgement.
Questions for the founder
A clean, forwardable list of what would substantiate the unverifiable claims. Useful to send, and it costs nothing to be the investor who sends it.
Regulatory register checks
FCA authorisation for financial services claims, device clearance for medtech, professional standing for legal. Each an exact-match register lookup, or nothing at all.
Literature checks
Mechanism and performance claims in life sciences and medtech, tested against the published literature rather than taken on trust.
Market-size sourcing
Where a market figure came from, and where it sits in the range of published estimates. Most decks quote the top of the range.
Features in build are released to members at no additional cost as they ship. We list them here rather than implying they already run, which is the same standard the analyser applies to a founder's deck.
What the analyser doesn't do
It does not score a company, rank a deal, or tell you whether to invest. It surfaces and cites, and it flags what is missing. Anything that read like a recommendation would be worth less to you, not more, because you could not see what it rested on.
It does not manufacture confidence where there is no source. Most of what a deck claims about its own traction, revenue and customers cannot be checked against anything external, and the analyser marks that plainly instead of dressing an inference as a finding.
Market signal
Individual deals are interesting. The aggregate is more useful. Members receive a periodic read on what is actually moving through the advance assurance pipeline: sector concentration, stage and structure, scheme mix, and how those shift quarter on quarter.
It is drawn from application flow, aggregated and anonymised, so it reflects what founders are filing rather than what the market is talking about. Sector movement shows up here before it appears in funding data, because filing precedes the raise.
Signal is derived from flow in aggregate. No individual company appears in it, whether or not the founder has opted in to the network.
How it works
01
Apply and certify
Tell us about your investing. Membership is open to certified high net worth and self-certified sophisticated investors, so certification comes first, before your account is activated.
02
Set your thesis
Sectors, stage, cheque size, structure. You see what matches your thesis rather than everything that moves through the pipeline.
03
Screen what interests you
Run any deck through the analyser, from the network or from your own flow. Read the ledger, follow the citations, send the founder the questions.
04
Approach directly
Where a founder has opted in, you approach them yourself. Seisly does not sit in the transaction, take a fee on it, or advise either side.
What members get
£49
a year, all in. Deal flow, unlimited use of the analyser, market signal, and every feature released during your membership year.
A founding member rate, held for as long as your membership runs while the network is being built.
Seisly earns nothing from the transactions you do. No carry, no success fee, no commission.
Earlier than the deck. Companies surface at advance assurance, which is months before a deck is in circulation and before the round is half-committed.
Structured, not anecdotal. Sector, stage, trade, structure and scheme captured consistently across every application, rather than gleaned from conversation.
Screening that shows its working. Every verified claim carries the source it was checked against. Everything else is marked unverifiable, plainly, which is the honest output.
No economics on your deals. No carry, no success fee, no introduction commission. The flow you see is not sorted by what pays us most, because nothing does.
Who can join
Membership is restricted to investors who can certify their status. You will be asked to complete the appropriate statement before your account is activated, and to re-certify annually.
If you cannot certify under one of these categories, we cannot admit you to the network, and we will say so rather than take the fee.
Questions
Neither. There is no pooled vehicle, no nominee and no collective investment. Members see companies and approach them directly. Seisly is not a party to anything that follows, and earns nothing from it.
Founders who come to Seisly for SEIS or EIS advance assurance. That happens when a company is preparing to raise, which is earlier than a deck reaching the market. Companies appear to the network only where the founder has opted in.
Yes, always. A founder comes to Seisly for advance assurance, not to be listed. Nothing about a company reaches the network unless the founder has actively chosen to be visible. That is a deliberate constraint and it is not negotiable.
Yes. Unlimited decks, whether they came from the network or from anywhere else.
No, and it is built not to. It separates what is verified from what is unverifiable, cites its sources, and flags what is missing. The judgement stays with you. Anything that read like a recommendation would be worth less, not more.
It says so. Most of what a deck claims about its own traction, revenue and customers has no external source at all, and the analyser marks those unverifiable rather than manufacturing a view. That is the point, not a limitation.
No. No carry, no success fee, no commission. The membership fee is the whole commercial relationship, which is why the flow is not ranked by what earns us most.
No. Seisly does not advise on investments, arrange transactions, or recommend companies. Membership provides information and screening tools. Decisions and diligence are yours.
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Risk warning.Investing in early-stage companies puts your capital at risk. These investments are illiquid, there is rarely a secondary market, and you should be prepared to lose the whole of any amount you invest. Past performance is not a guide to future performance. Tax reliefs depend on individual circumstances, on the company maintaining its qualifying status, and on tax law, all of which may change. Advance assurance is HMRC's opinion, not a guarantee.
Seisly is a service of Podium Platforms Limited, a technology company. Seisly is not a law firm, accountancy practice, tax adviser or investment adviser, and nothing on this page constitutes legal, accountancy, tax or investment advice, or a recommendation to invest. Seisly does not advise on, arrange or manage investments, and is not a party to any transaction between a member and a company. Membership provides information and screening tools only. The deal analyser reports what it can verify against cited sources and marks everything else unverifiable; its output is decision support, not a recommendation, and it does not replace your own diligence. For advice specific to your circumstances, consult an appropriately qualified professional.