Sonra is practice management for small architecture firms: simple enough that the team actually logs, one flat price however many people use it. Built for practices of 5-25 people, with a 30-day free trial and no sales call.
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Sage Timeslips has been the default time-and-billing tool for small professional firms for decades, and plenty of architecture practices still run their month-end billing on it. It records time and produces bills well. What it wasn't built for is how an architecture job actually runs: a fee split across phases, and a team that needs to know how far through that fee each phase is.
So the fee tracking usually ends up in a spreadsheet next to Timeslips, kept up to date by one person, and seen by nobody else until the job is already over. Timeslips is also priced per user, so firms ration logins, and the hours that never get logged are the ones that make the fee picture wrong.
Sonra was built by a former architect for practices of 5-25 people. Time goes against projects and phases, every phase has a fee budget, and you can see where each phase will land once the open tasks are done. Everyone gets a login for one flat price, and you can bring your existing hours across during the free trial.
How the two stack up on the things architecture firms ask about most.
| Feature | Sonra | Timeslips |
|---|---|---|
| Built specifically for architecture firms | ✓ | General time & billing |
| Time tracking | ✓ | ✓ |
| Time against project phases | ✓ | Client / activity codes |
| Fee budget for every phase | ✓ | — |
| Projection of where each phase will land | ✓ | — |
| Tasks with hour estimates & checklists | ✓ | — |
| Team resourcing & time off | ✓ | — |
| Runs in the browser | ✓ | ✓ Anywhere edition |
| One flat price for the whole firm | $180/month | $44 + $34 per extra user |
| Built for practices of 5-25 people | ✓ | Firms of any kind |
Comparison based on publicly available information from sage.com, current as of October 2026. Timeslips prices are Sage's listed Timeslips Anywhere prices, before promotions. Sage and Timeslips are trademarks of their respective owner; Sonra is not affiliated with or endorsed by Sage. Features and pricing change - please verify current details with each vendor.
The reasons architecture practices pick Sonra when they move off Timeslips.
$180 a month for the whole firm. Everyone gets a login, so nobody rations seats and the interns' hours get logged too.
Every phase has a fee budget, and you can see where it will land once the open tasks are done, without a spreadsheet kept alongside.
Staff see their tasks for the week and tick them off as they log time. Built by a former architect, so the workflows match how a practice runs.
Timeslips does its job, and switching has a cost. You're probably better served staying put if:
If you're a practice of 5-25 people that bills against phase fees, and you want the whole team working against them for one flat price, that's the firm Sonra is built for.
What firms ask when comparing the two.
Yes, if you're a practice of 5-25 people. Timeslips is general time-and-billing software that architecture firms adapt to their work. Sonra is built for architecture practices: time is logged against projects and phases, every phase has a fee budget, and you can see where each phase will land once the open tasks are done, alongside tasks and resourcing.
Sonra is $180 per month, flat, for the whole firm, however many people use it. Sage lists Timeslips Anywhere at $44 per month for the first user and $34 for each additional user, so a 10-person firm pays about $350 a month and a 15-person firm about $520.
Phase-based fee budgets, a projection of where each phase will land once the open tasks are done, tasks with hour estimates and checklists, a personal week planner for staff, team resourcing and time-off requests. Timeslips records time and produces bills; Sonra also shows whether each job is on track against its fee.
Yes. Export your time slips to a spreadsheet and we'll import the hours against your projects and phases during the 30-day trial, so your budgets start from where each job actually is rather than from zero.
Start a 30-day free trial, or book a demo and we'll walk through your firm's workflow.
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