Sinaxe turns complex tax work into structured, auditable, AI-assisted workflows.
Sinaxe also works for consultancies, in-house tax teams, and government agencies — these are the two it was built around first.
Build repeatable, structured workflows around the calculations and filings your team already runs — connected to the spreadsheets you use, not replacing them.
Talk to us →Keep regulatory and compliance work structured and traceable, with the same rigor your practice already holds itself to — less manual reconciliation, not less diligence.
Talk to us →Tax work is still trapped across spreadsheets, emails, documents, and people's heads.
help AI understand the workflow context
Easily track reasoning, sources, decisions, and steps behind the work.
Built for fast-moving teams.
Collaborate in real time with live edits and comments.
preserve audit trails across sessions
Turn recurring tax processes into reusable workflows that can be shared,
track sources, evidence, and work history
Help new team members understand not only the final numbers, but the reasoning, sources, decisions, and steps behind the work.
Sinaxe adds the missing layer around Excel-based work: sources, evidence, context, AI assistance, approvals, and audit history.
Right person, right task
For fiscal teams to build repeatable processes from sources, calculations, review steps, and outputs.
Clarity at a glance
Extract, summarize, and structure information from any document seamlessly.
Work your way
Link each value to documents, source lines, user decisions, assumptions, and calculation history.
Work your way
Use AI to suggest mappings, identify inconsistencies, explain context, and support review without replacing professional judgment.
Work your way
Track who changed what, when, why, and from which source.
Adapts to shifting priorities and real workflows — keeping projects aligned, teams accountable, and decisions clear.
Tasks are automatically distributed based on each member's bandwidth, so no one's overbooked or underused.
Switch seamlessly between project views — from team-wide timelines to individual to-dos — all tied to real context.
AI analyzes patterns in your team's workflows to recommend next actions, assign owners, and flag inefficiencies.
Each task has its own collaborative thread with notes, comments, and file sharing — no need to switch tools.
From small teams to enterprise org charts, structure tasks across departments, assign roles, and maintain clarity.
Packed with thoughtful features that help teams stay aligned, avoid confusion, and move fast — without the chaos.
Prevent task conflicts with built-in smart scheduling.
Act fast with alerts—no clutter or missed updates.
Stay synced—updates auto-load once you're online.
Track every edit and action with built-in transparency.
Automate with flexible task logic and helpful reminders.
Built for clarity, ease, and real-world user needs and habits.
Insights and strategies to boost productivity, collaboration, and smarter task management.
Common questions about how Sinaxe works, who it's for, and what to expect.
No — Sinaxe builds around Excel rather than replacing it. We connect your existing spreadsheets to other systems, trace every number back to its source, and turn one-off calculations into a repeatable process.
Tax workflows of any complexity — multi-step calculations, regulatory checks, and filings.
No. The AI assists — surfacing information, suggesting next steps, and pulling together what's useful — but the judgment calls stay with your team.
Yes, highly. The visual builder makes it straightforward to put one together yourself.
A working test automation of one of your workflows, plus a free quote for building out the rest.
No — it works for firms of any size, small, medium, or large, as long as there's a team and a budget behind the project.
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