Pricing & licensing
Straightforward licensing, however you buy.
SynthoDesk starts with a 30-day trial of the full suite. Buy through Microsoft or through Paddle — the channel is your choice, not your category. Your documents and data always stay in your own tenant.
The product family
Licensing across all three products
Per-seat licensing, no minimum team size, and no data held hostage. Prices are per seat and exclude sales tax or VAT, which is added at checkout.
SynthoDesk
The Microsoft 365 add-in suite for engineering teams. Requires Microsoft 365 — it runs inside Word, Excel, PowerPoint and Outlook.
System requirements
- Requires a Microsoft 365 subscription — does not work with one-time-purchase or perpetual Office licences
- Windows: Microsoft 365 build 2501 (18407.20002) or later
- Mac: version 16.103 (25101427) or later
- Outlook on Mac: not supported
- Mobile (iOS/Android): not supported
- Office on the web and new Outlook for Windows: supported
Pricing announced at release
billed annually
Excludes tax
Per seat, billed monthly or annually. Buy through Microsoft or through Paddle.
- Complete suite across Word, Excel, PowerPoint & Outlook
- 200+ engineering calculators, cited to their source standards
- Document control, revision tracking & standards checks
- Sign in with your Microsoft account — no licence keys
- Central deployment for teams from the Microsoft 365 admin centre
Card required. Cancel before the trial ends and you will not be charged.
SynthoFlow
The calculation platform. No Microsoft 365 required — it runs in any browser, and an email address is enough to get started.
Pricing announced at release
billed annually
Excludes tax
Per seat. Buy through Microsoft or through Paddle.
- Browser only — nothing to install
- No work account or organisation needed
Card required. Cancel before the trial ends and you will not be charged.
SynthoOps
The whole back office in one governed system. No Microsoft 365 required — it runs in any browser, and an email address is enough to get started.
Pricing announced at release
Per seat. Buy through Microsoft or through Paddle.
- Browser only — nothing to install
- Modular — switch on only the parts you use
Billing & licensing
Pricing questions
Whichever suits you — both channels are open to any customer. Companies often prefer buying through Microsoft so the licence lands on procurement’s existing invoice; individuals usually prefer Paddle, since no work account or organisation is required. A channel is unavailable only where it technically cannot serve you.
The full suite — every app and calculator, nothing held back. A payment card is required to start so access continues seamlessly at the end of the trial. Cancel any time before day 30 and you won’t be charged.
Paddle acts as merchant of record for direct purchases — that is the name you will see on your card statement — and calculates any applicable sales tax or VAT at checkout. You can manage or cancel your subscription from the Paddle billing portal at any time. Purchases made through Microsoft are billed on your Microsoft invoice instead.
For SynthoDesk, yes — it is an add-in suite that runs inside Word, Excel, PowerPoint and Outlook, so a Microsoft 365 subscription is required. SynthoFlow and SynthoOps need nothing from Microsoft: they run in any browser, and an email address is enough.
Paddle automatically retries failed payments and notifies you by email; purchases made through Microsoft follow Microsoft’s own billing process. If a subscription lapses, the software shows a “renew access” message and stops functioning — but your documents and data stay where they are.
Subscription-based rather than a perpetual licence. Access is tied to your sign-in rather than static licence keys, and your documents and data always remain yours — SynthoDesk keeps them in your own Microsoft 365 tenant, and everything else exports cleanly.