Byron
Also known as: usebyron
AI agent platform for business tax preparation that automates the CPA workflow from client document intake to review-ready workpapers and returns, with every number source-linked and every step gated by human approval.
Byron is an AI agent platform for business tax preparation, built for CPA firms preparing 1065, 1120 and 1120-S returns, that runs the engagement from client request list to review ready workpapers while the firm's reviewers keep control.
Its agents sync client data from accounting software, tax systems, email and document management systems and generate the PBC request list, organize incoming documents into a binder, learn how the firm treated each client's items last year across M-1, M-3, depreciation and state apportionment, apply the same treatment to this year's data while surfacing exceptions, and generate the Excel workpapers in the firm's own tabs, templates and conventions, with federal and state K-1s, K-3s and footnotes handled in full.
Excel stays central and synced both ways, so reviewer edits flow back into Byron and into the tax engine without rekeying, and the agents stay on the engagement as late K-1s, revised trial balances and client corrections arrive, updating the workpapers they affect and flagging what changed.
Every prepared value links to its source document and carries a confidence score, reviewers start with the items most likely to need attention, and nothing exports to the firm's tax software until the firm reviews, approves and signs off; every action, edit, approval, override, sync event and export is recorded. Byron is SOC 2 Type II compliant, supports single sign on and role based access so the firm controls who sees which clients and engagements, enforces multi factor authentication, hosts all data in the United States, and never trains models on client data.
It integrates with accounting platforms including Canopy and Truss. Founded in 2025 in San Francisco by a team from Amazon's AGI group and Deloitte, Byron launched publicly in May 2026 with a $6.5 million seed round led by Square Peg and is sold by demo. It is a strong fit for firms automating the preparation behind complex business returns with reviewers in control, and does not offer model choice or self hosted deployment.
Vendor details
Canonical URL
https://www.usebyron.com
Category
Enterprise operations agent
Subcategory
AI tax preparation for CPA firms
Funding status
Independent, based in San Francisco, founded in 2025 by Blaze O'Byrne (CEO) and Wilm Kranz, with a team drawn from Amazon's Artificial General Intelligence group and Deloitte. Byron raised a six and a half million dollar seed round led by Square Peg, with participation from Sorenson Capital, Liquid 2 Ventures, and Correlation Ventures. The company began building in September 2025, brought its first clients live in January 2026, and launched publicly in May 2026, with distribution partnerships through platforms including Canopy and Truss.
Company status
independent
Use cases & customers
Primary use cases
Target customers
Deployment options
Integrations
Byron works across the tools CPA firms already use, including email, file storage, accounting systems, Excel, and tax software, and it moves approved data into existing tax engines without manual rekeying. Edits made in Excel flow back into Byron automatically. The platform integrates with accounting platforms such as Canopy and Truss, which embed Byron's capabilities into their own workflows, implying an integration surface beyond a single application.
In practice
A firm rebuilds prior year workpapers by hand every busy season. Byron rolls them forward into a current year Excel workbook with this year's data and requests whatever client information is missing.
Business returns are too complex and review heavy to trust to generic AI. Byron's task specific agents source link every number and gate each step, bringing the CPA back in whenever something needs a human.
Client data arrives as messy PDFs and spreadsheets. Byron extracts and reconciles it, prepares review ready output, and syncs approved data into the firm's existing tax software.
Sources & related URLs
Research sources
Agentic Index coverage score
8.5 / 14 capabilities · 61%
| Integrations & Tool Calling | Full |
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Byron syncs from accounting software, tax systems, email and document management systems, keeps Excel synced both ways with reviewer edits flowing back into Byron and into the tax engine, and moves approved output into the firm's tax software under role based export permissions; the homepage names Canopy and Truss as integrated platforms. The tax engines it exports to are not named. SourceByron, usebyron.com/business-tax and usebyron.com/securityread 2026-09-06 |
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| Workflow Orchestration | Full |
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The business tax page documents a six stage pipeline the agents run across the engagement: pulling client data and generating PBC request lists, organizing the binder, learning last year's return, applying book to tax adjustments, generating the Excel workpapers, and review and export, with each stage handled by a specialized agent and the FAQ describing agents that use tools and integrations to run the whole job from gathering documents to preparing the return for review. Multi step, multi agent execution across a whole engagement on the vendor's own surface is documented. SourceByron, usebyron.com/business-taxread 2026-09-06 |
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| Knowledge Grounding & RAG | Full |
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Byron ingests each client's prior year workpapers and return, learns how the firm treated specific items across M1, M3, depreciation and state apportionment, and maps current year data onto the same structure with the same tabs, templates and conventions, applying similar treatment as last year and surfacing exceptions. That store of the firm's own prior work per client persists across years and is queried on each engagement, and every prepared value traces back to its source document. SourceByron, usebyron.com/business-taxread 2026-09-06 |
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| Human Oversight & Guardrails | Full |
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Nothing exports to the firm's tax software until the firm reviews, approves and signs off; the business tax page documents an approval workflow in which agents suggest next steps and reviewers approve the work before it moves forward, exception based review starting from the items most likely to need attention, override and sign off history in the review package, and confidence flags on every item, all inside the vendor's own review queue. SourceByron, usebyron.com/business-taxread 2026-09-06 |
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| Security, Identity & Governance | Full |
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Byron's security page documents both an attestation and access controls: SOC 2 Type II audited annually against the Trust Services Criteria with the report shared under NDA, alignment with IRS Publication 4557, annual independent penetration testing; and an access surface the firm controls, support for all common single sign on protocols, role based access so the firm controls who can see which clients and engagements, enforced multi factor authentication, and role based export permissions. SourceByron, usebyron.com/securityread 2026-09-06 |
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| Observability & Auditability | Full |
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Every prepared value traces back to its source document and supporting context, and a workbook aware audit trail records every action, edit, comment, approval, override, workbook update, sync event and export, with the homepage stating an audit log on every value and action. SourceByron, usebyron.com/security and usebyron.com/business-taxread 2026-09-06 |
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| Memory & State Persistence | Partial |
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The homepage documents a Chat surface through which Byron takes instructions and completes tasks, which carries conversation state inside a session. No memory layer with a stated scope and lifetime is documented; the engagement state agents pick up where they left off is the application's work product, and the prior year treatments per client are the firm's knowledge rather than agent memory. SourceByron, usebyron.com and usebyron.com/business-taxread 2026-09-06 |
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| Deployment & Data Residency | Not documented |
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The security page states all data is stored and processed in US data centers on AWS, no data leaves the country, and the homepage repeats US only hosting; no region a customer selects, no customer cloud, on premises or customer tenant option, and no selection surface is documented. SourceByron, usebyron.com/securityread 2026-09-06 |
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| Prebuilt Agents, Templates & Packs | Partial |
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The specialized agents for book to tax adjustments, depreciation, apportionment and partnership allocations are stages of one business tax pipeline, and the site sells one platform through two solution pages, Business Tax and K-1 Processing. No catalog, template library or named set of agents the customer selects among is documented, and whether K-1 Processing can be adopted on its own is not stated. SourceByron, usebyron.com and usebyron.com/business-taxread 2026-09-06 |
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| Triggers & Channel Coverage | Full |
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The business tax page documents agents that are long running by design, staying on the engagement and picking up where they left off as new documents land, syncing from accounting software, tax systems, email and document management systems, processing new documents as they arrive and flagging what changed, and asking clients for what is missing; the homepage adds a Chat surface that takes instructions. Whether the firm can configure schedules or further inbound channels is not documented. SourceByron, usebyron.com/business-tax and usebyron.comread 2026-09-06 |
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| Model Flexibility & Routing | Not documented |
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No model provider is named; the security FAQ refers to the vendor's AI providers in the plural under terms that prohibit training, and the agents use tools such as Python for calculation. No customer or admin selection of a model is documented, and the plural is a passing disclosure rather than documented routing. SourceByron, usebyron.com/securityread 2026-09-06 |
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| APIs, SDKs & MCP Extensibility | Partial |
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The homepage states Byron integrates directly with accounting platforms Canopy and Truss, and the vendor's May 2026 launch release describes those platforms bringing Byron into their own workflows, an outside platform invoking Byron. No public API reference, SDK, MCP server or agent card for the Byron platform is documented, the site carries no developer link, and the app sits behind a login; the direction of the Canopy and Truss integration is not stated on the current pages. SourceByron, usebyron.com and the vendor issued release of 27 May 2026read 2026-09-06 |
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| Testing, Debugging & Optimization | Not documented |
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No evaluation harness, scored test cases, quality gate on a change to an agent or optimization loop is documented. A confidence score on every prepared item routes reviewers to what needs attention, which gates each output rather than testing a change, and the published 99 and 97 percent accuracy figures are the vendor's benchmark of its own product rather than an evaluation surface for the firm. SourceByron, usebyron.com/business-tax and usebyron.comread 2026-09-06 |
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| Browser & Computer Use | Not documented |
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Agents reach the firm's systems through connections to file storage, accounting systems, email, Excel and tax software and work inside the vendor's own workspace; no browser, desktop or computer control is documented. The mechanism by which approved output is pushed into the tax engine is not stated. SourceByron, usebyron.com/business-taxread 2026-09-06 |
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The Agentic Index coverage score grades every vendor Full, Partial or Not documented against the same 14 buyer facing capabilities, from public evidence only. Each capability links to how all vendors in the index score on it. How this evidence is graded
Pricing
Contact for pricing
What is public
No list prices or entry point are published; Byron is demo gated.
Billing mechanics
Not published. Inference, not stated by the vendor: pricing is likely to scale with firm size or return volume.
Cost watchouts
Busy season volume can raise effective cost if pricing scales with returns processed.
Variable cost rationale
Scope likely scales with the number of returns, entities, or seats a firm processes, so cost can grow with volume, though pricing is negotiated under annual agreements rather than metered by usage.
Additional watchouts
Confirm how pricing scales with returns, entities, and seats, and how access is provided when reached through partner platforms like Canopy or Truss.
Sales call required
Yes, required for paid access
Free / trial
Demo led evaluation; no public free tier
Lowest paid plan
Not published
Key ambiguities
No public anchor for entry price or scope units.
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Alternatives to Byron
The closest documented capability profiles to Byron among enterprise operations agents tracked by Agentic Index, ordered by similarity on the same 14 point evidence the rankings use. No vendor pays for placement.
- Basis7.5 / 14A lighter documented profile than ByronByron vs Basis →
- Otel AI8.5 / 14Adds documented Model Flexibility & Routing
- RegASK8.5 / 14Adds documented Deployment & Data Residency
- Tabs8.5 / 14Fuller documented coverage on APIs, SDKs & MCP Extensibility
- Vic.ai7.5 / 14A lighter documented profile than Byron
- Workable8.5 / 14Fuller documented coverage on APIs, SDKs & MCP Extensibility
Similarity is computed from each vendor's Agentic Index coverage score evidence, axis by axis, not from the totals. How this evidence is graded