Sitestack and Access Fonn
Sitestack or Fonn?
Fonn is the closest product to Sitestack: UK, phone first, aimed at contractors without a big IT team. The biggest difference today is that Sitestack publishes its prices and Fonn asks for a quote.
Checked 24 October 2026 against each company's public pages.
Cost
What it costs.
Access Fonn charges like this: A flat yearly fee, not per user, subcontractor or project. No price is published; you request a quote. Tiers differ in how many extra modules you can add.
| Product | What it costs a firm with 10 staff | Where the figure comes from |
|---|---|---|
| Sitestack | £1,910 a year, ex VAT£191 a month, paying yearly for ten months. Growth plan, Site Control and Safety Pro, free logins for everyone outside your staff. | Our pricing page |
| Access Fonn | Not published. Listing sites quote £5,500 to £11,000 a year, but they conflict and are unverified | On request; they do not publish a price |
Checked 24 October 2026. Figures are in each company's own currency, not converted, and are not like for like: what each plan includes differs. Outside estimates are not quotes. Check current prices before you decide.
Side by side
Sitestack and Access Fonn, row by row.
| Topic | Access Fonn | Sitestack |
|---|---|---|
| How it is priced | Flat yearly fee, quote on request | Published monthly prices by team size, flat add-ons |
| Cost signal | Outside listings conflict (about £5,500 to £11,000 a year) | See the cost table above |
| Free trial | Demo and pricing on request | 14 day free trial with every tool on. |
| Users | Unlimited users in the fee | Subcontractors, consultants and clients log in free. Only your own staff take a seat. |
| Snagging, Part L photos, RFIs | Yes | Yes |
| Customers you can phone | Named case studies | Not yet |
| Best for | UK contractors who want a proven product | UK firms who want clear pricing and flexible add-ons |
Checked 24 October 2026 against each company's public pages. Things change; tell us if we have got something wrong.
Fair is fair
Where Access Fonn is stronger.
We would rather you pick the right tool than the wrong one.
Track record and customers
Fonn shows named customers, case studies, a Trustpilot rating and a stated seven day onboarding. Sitestack has not launched yet and shows none of these.
Backing and security credentials
As part of the Access Group it cites ISO 27001 and a large parent company. Sitestack is an independent start up.
Unlimited users in the fee
Its fee is flat and covers unlimited users, which suits a firm with a large team.
Our side
Where Sitestack is stronger.
Published prices
Fonn pricing is by request. Sitestack lists every plan and add-on, so you can budget without a call.
Built by a working construction company
Sitestack came out of JLS Building and Property Development's own jobs. Fonn is now one product in a very large software group.
Pay for what you use
A core app for domestic work and refurbishment, with flat priced add-ons for safety, live environments, networks and contracts. You are not buying a module bundle.
Specialist depth
Tools for HV, LV and utility contractors, occupied buildings and JCT or NEC4 administration. Check Fonn's module list against your work.
The short answer
Which should you pick?
Pick Access Fonn if
You want a proven UK product with named references and a parent company behind it, and you are happy to get a quote.
Pick Sitestack if
You want to see the price first, try it for 14 days with everything on, and deal with the people who build it.
Questions
Sitestack or Access Fonn: questions.
Is Sitestack cheaper than Fonn?
Is Fonn more established?
Start your 14 day trial
14 day free trial. Every tool is on while you try it. Your card is taken at sign up and nothing is charged until the trial ends.