We use cookies
Our site relies on them (cookie policy)
FounderCatalyst ASA vs SeedLegals SeedFast

An ASA. At a very different price.

Both products let you raise investment quickly on an Advanced Subscription Agreement before your valuation is set. We bundle SEIS/EIS advance assurance and compliance in for free. SeedLegals does not.

Prices exclude VAT. SeedLegals pricing taken from seedlegals.com on 19 June 2026.

Pricing - small raises

Raising up to £100,000 a year

Like for like on a £100,000 raise: our Launchpad subscription covers unlimited ASAs for one fixed fee, while SeedLegals charge the Funding membership plus per-investor SeedFast fees on top.

FounderCatalyst Launchpad

SeedLegals SeedFast

Costs for a £100,000 raise

Annual membership
£995 all in
£1,199 / yr
Fundraising fee (percentage of raise)
None
+£1,000 Flex
SEIS/EIS advance assurance
Included
1 included, then £499 each
SEIS/EIS compliance and certificates
Included
1 included, then £599 each

FounderCatalyst Launchpad is one fixed fee covering unlimited ASA, Agile and priced rounds up to £100,000 raised a year, with SEIS/EIS advance assurance and compliance included. SeedLegals SeedFast is charged per investor (from £150 each, as a percentage of the investment), or via Flex credits at £1,000 for a £100,000 raise; the one SEIS/EIS advance assurance or compliance is part of the £1,199 membership, not a free add-on.

Pricing - larger raises

Raising £500,000

Like for like on a £500,000 raise: Core lifts the fundraising cap entirely for one flat fee, while SeedLegals' membership and percentage-based fundraising fees both climb with the amount raised.

FounderCatalyst Core

SeedLegals SeedFast

Costs for a £500,000 raise

Annual membership
£1,995 all in
£1,199 / yr
Fundraising fee (percentage of raise)
None
+£4,500 Flex
SEIS/EIS advance assurance
Included
1 included, then £499 each
SEIS/EIS compliance and certificates
Included
1 included, then £599 each

FounderCatalyst Core lifts the cap entirely for one flat fee, any raise size. SeedLegals' Flex credits are charged as a percentage of the raise that climbs with larger rounds (read at £100,000 as £1,000 and £500,000 as £4,500 on 19 June 2026); the one SEIS/EIS advance assurance or compliance is part of the £1,199 membership, not a free add-on.

Feature by feature

Both take investment on an Advanced Subscription Agreement that converts into shares at your next priced round. The legal mechanics are the same. The bill is not.

FounderCatalyst ASA

SeedLegals SeedFast

What's included in the price

Advance Assurance
Included
From £499
SEIS/EIS compliance and certificates
Included
From £599

ASA document features

Discount on the next round
Valuation cap
Automatic longstop conversion
Automatic conversion at next funding round

Administration and compliance

Share certificates produced automatically
Cap table kept up to date
Data room

SeedLegals pricing taken from seedlegals.com on 19 June 2026. All prices exclude VAT.

Founders who switched

Why founders moved from SeedLegals

“I am doing a funding round using another legal paperwork provider but hit an issue with our SEIS/EIS advance assurance being queried. I wasn’t entirely confident in the proposed response to HMRC and someone recommended I speak to the FC team. They helped me to improve my response and their support led to a positive response. Amazingly helpful and knowledgeable team, even for someone who wasn’t a customer. I've recommended them to colleagues already and will be switching to FC for our next round!”
Nicola Telford
Nicola Telford
CEO & Co-Founder, Views For Change
Views For Change logo
“Just closed my round on FounderCatalyst - super simple and having the FC team on hand for any question (even the silly ones) was brilliant. Fixed fee is a game changer vs the competition, allowing you to keep more of the funds you raise for getting going with your business.”
Gemma Smith
Gemma Smith
Founder, Ar Tye
Ar Tye logo
“As a founder building an agentic AI platform for workforce planning in supply chains, I’m always looking for tools that save time and money. FounderCatalyst delivered both—the process was seamless, and it cost less than a tenth of what I was quoted elsewhere. It let us stay focused on growing the business, not buried in fundraising admin.”
Phillip Sewell
Phillip Sewell
Chief Executive Officer, Predyktable
Predyktable logo
“We had a quote from SeedLegals for nearly £9k to do our ASAs and you offer amazing ASA templates and supporting documents for free. Genuinely crazy!”
Alex Simpson
Alex Simpson
Founder, Fuze applications
Fuze applications logo
“Big fan of the team at Founder Catalyst. Despite having built divisions in startups from the ground up for the past 10 years, this is my first time as a founder and I naturally have a lot of questions and learning to do. Sam and the team have been great teachers and advisors. They have guided me through the process every step of the way - from my first priced round, to getting SEIS/EIS advanced assurance. Key differentiator - they'll be real and straight with you about how to get things done. If you're lacking in a certain area, they'll tell you. This is invaluable for a first-time founder given the very distracting and contradictory noise surrounding the build of a business. I had considered Seed Legals before Founder Catalyst and found their approach to be purely sales driven rather than focused on customer care & quality of input. Another founder recommended FounderCatalyst and I'm so glad they did. Finally, a big shoutout to Charles who has been a game changer in customised legal advice.”
Lily Kyriacou
Lily Kyriacou
Founder and CEO, Rezilien
Rezilien logo
“I’ve completed two rounds with FounderCatalyst and have referred at least five fellow founders for their fundraising legal needs. The team is not only highly experienced and knowledgeable but also incredibly supportive, responsive, and fully understands the fast-paced nature of deal-making for founders. Their founder-first approach and service quality made me switch from Seedlegals to FounderCatalyst after my first round. Highly recommended.”
Serkan Ferah
Serkan Ferah
Founder and CEO, Native
Native logo
“I switched from SeedLegals to FounderCatalyst which has proved both cheaper and the customer service is infinitely better. Everything is included in the one off fee so you aren't hit by extra fees you don't expect. The team includes ex founders and investors so you get both technical and tactical support, which wasn't the case with SeedLegals. I also get very rapid responses to my emails, which was a refreshing change. ”
Jem Stein
Jem Stein
Founder, Daring Capital
Daring Capital logo
“Best decision we made as founders was switching to FounderCatalyst. Wasted a load of money with Seed Legals originally. Advice from some junior guys there vs Sam (a multiple exited founder and investor himself) doesn’t even compare. Sam had to spent a lot of time unpicking bad advice we had previously but did so with minimum fuss and no extra cost. Can’t recommend enough.”
Dan Williams
Dan Williams
Founder and CEO, Hunch
Hunch logo
“I had a really important meeting with an investor and had realised my cap table needed adjusting since we had made a few changes in the last few months. We had been using another platform for our documentation, but unfortunately, time was of the essence, and I needed something I could send on ASAP, I needed help with it and unfortunately, this was not something they could provide. My first thought was of Sam. I have known Sam for the last few years whilst building Bezzelle and knew that he was someone who could potentially save the day, I can confirm not only brilliant with all things funding, also a super nice guy too! Awaiting the outcome of the investment meeting but he has a new customer for our next funding round! (Sorry in advance for all my share related queries!)”
Heather Egan
Heather Egan
Founder, Bezzelle
Bezzelle logo
“We moved to FounderCatalyst from their rival after our first round - the fee structure in FounderCatalyst suited us much better and the support provided by the FounderCatalyst team has been excellent. They have an automatic tool to import our CapTable and we were up and running within minutes. My next round will cost about a third on FounderCatalyst.”
Catherine Ann Reid
Catherine Ann Reid
Founder, Doqit
Doqit logo
“Ronseal for fund raises - they do what they say on the tin! Chose FounderCatalyst for our first fundraise over Vestd and SeedLegals after conversations with all three. Reason for choosing - Sam. Direct, no nonsense advice from someone who has been there and done it. Service once we were onboard did not disappoint. Clear guidance and instructions with questions answered quickly and comprehensively. No hesitation in recommending to other founders.”
Lee Curtis
Lee Curtis
Founder, Legal Engine
Legal Engine logo
“Sam and the team at FounderCatalyst go above and beyond to aid founders through the SEIS process to accreditation. Unlike their competitors, they charge a fixed fee, no recurring fee, and offer a tremendous peer-to-peer community, which has been invaluable in helping me build my team. It is time for change. Step away from household brands and try FounderCatalyst.”
Rebecca Middleton
Rebecca Middleton
Founder, Monitrix
Monitrix logo
“FounderCatalyst is a must for ALL businesses looking to raise capital. As a qualified accountant even I struggle with the legalities, paperwork and even dealing with HMRC to obtain advance assurance. FounderCatalyst removes all these headaches and unlike their competitors the co-founders are always on hand to provide valuable support every step of the way. Quite simply they have become an invaluable 'department' of my business and I'm very grateful to be working with them.”
Nicholas Charles
Nicholas Charles
CEO, Danti Holdings Limited
Danti Holdings Limited logo
“FounderCatalyst was incredible to work with from start-to-end for our pre-seed round. They were meticulous, prompt to reply, and handled numerous customisations. I've used other legal services and platforms which came up too expensive and prone to errors. FounderCatalyst is miles ahead in terms of service, value-for-money and legal expertise.”
Jaron Soh
Jaron Soh
Co-founder & CEO, Voda
Voda logo
“Blown away by the service and value: I was under pressure to close a funding round swiftly before the end of the tax year and the FC team were on point and held my hand right through the process. I’ve tried SeedLegals and the value we get from FounderCatalyst is way beyond - the support from FC is immediate and precise, compared with slow and inconsistent with SL.”
Lee Sandwith
Lee Sandwith
Founder and Managing Director, Better Tomorrow Brands
Better Tomorrow Brands logo
“Sam and his team are the real deal, they know what they are talking about and offer the best value in town. I can confidently say this having wasted money and been disappointed with another firm (SL) previously.”
Brenda Hobday
Brenda Hobday
Co-Founder, Alterra Systems
Alterra Systems logo

Ready to run your ASA round?

Start free, send the ASA paperwork in minutes, and bundle SEIS/EIS for nothing extra. No credit card required.