The calm Karbon alternative for small CPA firms
Karbon is built as a shared email triage engine. It hooks directly into Microsoft 365 and Google Workspace inboxes to convert email threads into collaborative firm timelines. For a 50-person advisory firm running complex corporate bookkeeping across large teams, that central inbox model distributes communication. For small CPA and tax practices, it creates notification fatigue, anxiety over email privacy, and a per-seat bill that jumps to the Business plan once you need time and billing. CPA Relay replaces inbox chaos with a calm, focused workflow from document intake to billing.
Currently invitation-only · $55 per seat per month, everything included
Why small firms look for an alternative
Work management without the shared inbox anxiety
Small CPA practices do not need their entire team reading every client email thread. They need clear accountability over who owes documents, who needs to sign, and what work is stuck.
Email and communication
Project Message Boards, not inbox surveillance
Karbon connects directly to employee inboxes, pulling client correspondence and private emails into shared activity feeds. Staff members worry about whether sensitive messages are exposed to coworkers, and email triage becomes an all-day chore.
CPA Relay separates firm communications from personal email. Each project has a dedicated Message Board for client discussions, while internal staff notes remain private. Email stays in your inbox, and client work stays in the project workspace.
Triage vs overwhelm
What's Outstanding triage sheet instead of endless feeds
In Karbon, triage means wading through dozens of internal status updates, mentions, and notification pings. Locating which client is actually blocking a project requires filtering through multiple activity timelines.
CPA Relay gives you What's Outstanding, a single firm-wide view organized by urgency, including Overdue, Due today, This week, and Later. A personal Waiting on me card surfaces the exact files or reviews awaiting your attention. Your staff knows who owes documents or signatures in ten seconds.
IRS compliance
Native Form 8879 e-signatures without external add-ons
Karbon does not offer native Form 8879 digital signatures. Practices must subscribe to third-party tools like Ignition, DocuSign, or Adobe Sign, paying extra subscription fees and managing separate audit trails.
CPA Relay includes native Form 8879 e-signatures with mandatory IRS Publication 1345 identity verification recording, tokenized one-time passcodes delivered to shared spousal inboxes, and permanent SHA-256 tamper-evident audit certificates on every signed PDF.
Setup and overhead
Setup measured in minutes instead of months of consulting
Karbon charges mandatory onboarding fees ranging from $1,000 to $2,500 and requires restructuring your firm around rigid work templates and task dependency trees.
CPA Relay is ready on Day 1. Pre-built engagement workspaces, 53 ready-to-use engagement letter templates, and reusable document checklists match standard tax and bookkeeping workflows straight out of the box. You import a client list and send an engagement letter in 15 minutes.
Capability breakdown
Side-by-side comparison
Compare core capabilities between Karbon and CPA Relay across 12 practical firm workflows.
| Capability | Karbon | CPA Relay |
|---|---|---|
| Target firm size | 20 to 200+ seat accounting firms, CAS practices, enterprise teams | Solo practitioners and small CPA practices, with no seat minimum or cap |
| Published pricing as of October 2026 | Karbon Team is $59 per user per month billed annually ($79 monthly); Business is $89 per user per month billed annually ($99 monthly) plus $1,000 to $2,500 onboarding fees | One plan: $55 per seat per month, or $45 per seat per month billed annually ($540 per seat per year). Every feature on every seat, unlimited free client logins |
| Contract terms & seasonal flexibility | Annual contracts billed upfront on standard plans; seasonal staff require full user license payments | Month-to-month, no annual contract required; add a seasonal seat for $55 a month and remove it when busy season ends |
| Typical onboarding & setup time | Several weeks to months of workflow consulting, template setup, and team training | Ready on Day 1; import client CSV and send first engagement letter in 15 minutes |
| Client portal design & file visibility | Client tasks delivered via email links without a full deny-by-default file portal | Strict deny-by-default visual clarity with amber client-facing folders and sky-blue internal workpapers |
| Form 8878/8879 e-signatures & KBA recording | External integration required through Ignition or DocuSign with separate software subscriptions | Native IRS Publication 1345 identity verification recording with zero per-envelope signature fees |
| Spouses sharing one email address | Relies on third-party e-sign workflows for joint taxpayer signatures | Independent tokenized signing ceremonies delivered to one shared email address with separate audit logs |
| Built-in engagement letter & Section 7216 templates | Template builder requiring manual drafting or external proposal tools | 53 pre-loaded US tax, bookkeeping, and Section 7216 consent templates ready to use |
| Workflow tracking vs pipeline automation | Deep task dependency chains, shared email timelines, and triage feeds | What's Outstanding firm triage sheet organized by due date and urgency |
| Time tracking & Price Book | Time and billing gated behind Business plan ($89 to $99 per user per month) | Locked Price Book with snapshotted labor rates and 6-minute or 15-minute billing increments |
| Invoicing & payment fee passthrough | Invoicing requires higher tier and third-party accounting software sync | Proposal-to-invoice conversion with native Stripe card and ACH fee passthrough to clients |
| Mobile app & browser experience | Native mobile app designed for team email triage and notifications | Fully responsive browser experience that works instantly on any desktop, tablet, or smartphone |
Total cost of ownership
Pricing and contract math as of October 2026
Karbon per-seat pricing escalates rapidly as team size grows. When you add mandatory onboarding fees and external subscriptions for Form 8879 e-signatures, total firm expenditure reaches enterprise levels.
Karbon pricing structure as of October 2026
Karbon charges per user per month. Its entry Team plan costs $59 per user per month when billed annually upfront, or $79 per user per month when billed monthly. However, the Team plan excludes time tracking, billing, and budget management.
To access time tracking and firm billing, practices must upgrade to the Business plan, which costs $89 per user per month billed annually, or $99 per user per month billed monthly. In addition, Karbon charges mandatory implementation fees ranging from $1,000 to $2,500. Because Karbon lacks built-in Form 8879 digital signatures, firms must also maintain external subscriptions to Ignition, DocuSign, or Adobe Sign, adding $500 to $1,500 or more per year.
For a small practice, paying $89 to $99 every month for every staff member creates high fixed overhead before completing your first tax return.
CPA Relay per-seat pricing
CPA Relay also charges per seat, but there is one plan and nothing is gated behind a higher one. Every seat gets unlimited client portal logins, all 53 engagement letter templates, Form 8879 e-signatures with identity verification recording, time tracking with a locked Price Book, and native Stripe payment processing.
- Monthly. $55 per seat per month, month-to-month.
- Annual. $45 per seat per month billed annually, or $540 per seat per year. That works out to about two months free.
- Client logins. Unlimited and free. Clients never take a seat.
- Storage. 50 GB per seat, pooled across the firm. Six seats share 300 GB.
There are no onboarding fees and no annual contract required. Need a seasonal preparer? Add a seat for $55 for the months you need it, then remove it.
Scenario 1
1-seat solo firm
Karbon at $1,700 to $2,200+ yr 1
CPA Relay at $540 to $660/yr
A solo practitioner on Karbon Team monthly pays $948 per year, plus $1,000 onboarding and external e-sign software. Year one exceeds $2,200. On CPA Relay, one seat costs $540 per year billed annually or $660 per year paid monthly, with e-signatures included, saving over $1,500 in year one.
Scenario 2
3-seat small partnership
Karbon Business at $3,204/yr
CPA Relay at $1,620 to $1,980/yr
A 3-person firm using Karbon Business for time and billing pays $3,204 upfront every year plus onboarding. On CPA Relay, 3 seats cost $1,620 per year billed annually or $1,980 per year paid monthly, time and billing included, saving between $1,224 and $1,584 annually.
Scenario 3
5-seat CPA firm
Karbon at $3,540 to $5,340/yr
CPA Relay at $2,700 to $3,300/yr
For a 5-person CPA firm, Karbon Team costs $3,540 per year, while Business costs $5,340 per year. CPA Relay costs $2,700 billed annually or $3,300 paid monthly. Against Team the gap is only $240 to $840, but Team has no time tracking or billing. Against Business, which does, the firm saves $2,040 to $2,640 a year.
Operational reality
How daily firm operations compare in practice
Software architecture dictates how your day feels. Turning every email into a collaborative timeline creates constant triage overhead.
Shared inbox triage vs project Message Boards
Karbon core design pulls personal and firm inboxes into shared timelines. Staff members worry whether a confidential email from a partner, a private payroll question, or personal mail is visible to colleagues. Triage requires clearing dozens of internal notifications, mentions, and shared email assignments. Tax preparers spend their morning sorting through incoming inbox notifications rather than preparing returns.
CPA Relay separates firm communications from personal email. Each project has a dedicated Message Board for client questions and document clarifications. Internal staff notes remain strictly private. Firm triage is handled by What's Outstanding, an automated list organized by urgency, including Overdue, Due today, This week, and Later, with a personal Waiting on me filter.
Client portal clarity, document intake, and PBC requests
Karbon delivers Client Tasks as web links sent over email. While functional for single document requests, it lacks a true client portal with folder separation. Clients cannot see their full file archive or distinguish between client-facing deliverables and internal review workpapers.
CPA Relay provides an intuitive client portal with amber client-facing folders and sky-blue internal workpapers. Clients log in, see an itemized checklist of missing W-2s, 1099s, and K-1s, drag and drop files, and sign Form 8879 without confusion.
US tax compliance, Form 8879 e-signatures, and spousal signing
Karbon does not offer native Form 8879 digital signatures. Practices must bolt on external signature tools, adding subscription costs and disconnected audit trails. When married taxpayers share one email address, external tools often fail to handle independent signing ceremonies cleanly.
CPA Relay includes native Form 8879 digital signatures built for IRS Publication 1345 rules. Verification methods are recorded directly on the final SHA-256 audit certificate. Spouses sharing an email receive individual tokenized ceremonies. In addition, 53 engagement letter and Section 7216 consent templates are included out of the box.
Time tracking, Price Book billing, and payment fee passthrough
Karbon gates time tracking and billing behind its expensive Business tier at $89 to $99 per user per month. Invoicing often requires syncing with QuickBooks Online or external billing engines.
CPA Relay includes 6-minute and 15-minute time tracking on every seat. Hourly labor rates are snapshotted from the firm Price Book upon logging to protect historical WIP. Convert unbilled hours or fixed-fee proposals into Stripe invoices in one click, with automated credit card and ACH fee passthrough to clients.
Honest practitioner guidance
Choosing the right software for your practice
Every accounting practice has different operational priorities. Here is clear, honest guidance on when Karbon is the better fit and when CPA Relay makes more sense.
Ideal fit for Karbon
When to choose Karbon
Karbon is an excellent software platform for specific types of accounting organizations:
- 20 to 200+ seat accounting and CAS advisory practices where shared email collaboration across multi-tiered teams is the central business bottleneck.
- Firms requiring complex Gantt-style capacity planning, staff resource allocation charts, and deep integrations with enterprise practice suites.
- Practices that want all incoming client email threads converted into collaborative team tasks.
Clear boundaries
Who should not choose CPA Relay
CPA Relay is deliberately designed for small, focused practices. You should not choose CPA Relay if:
- You run a 30-person firm looking for firm-wide shared email triage across hundreds of client conversations daily.
- You require complex multi-department capacity planning software and staff utilization forecasting charts.
- You seek an all-in-one general ledger or tax calculation engine. CPA Relay handles practice management, client intake, e-signatures, and billing, but does not prepare tax returns.
Common questions
Frequently asked questions
Answers to common questions from practitioners evaluating Karbon and CPA Relay.
Why does CPA Relay avoid syncing employee email inboxes into a shared timeline like Karbon?
Syncing personal and firm inboxes creates notification fatigue and privacy concerns for staff members. CPA Relay uses dedicated project Message Boards for client communication, keeping private email private while providing full firm visibility into project status.
How does Karbon per-user pricing compare to CPA Relay?
Both charge per seat. Karbon charges $59 to $89 per user per month billed annually, and time tracking and billing need the $89 Business plan, so a 5-person firm pays $3,540 to $5,340 per year. CPA Relay charges $45 per seat per month billed annually or $55 month-to-month, with time tracking, billing, and Form 8879 e-signatures on every seat. The same firm pays $2,700 to $3,300 per year.
Can CPA Relay replace third-party e-signature subscriptions like DocuSign or Ignition?
Yes. CPA Relay includes native Form 8879 e-signatures with IRS Publication 1345 identity verification recording, dual-spouse shared email support, and 53 engagement letter templates on every seat at no additional cost.
How does CPA Relay handle client task tracking and document collection?
CPA Relay pairs client-shared document requests directly with an itemized checklist. Clients see exactly what is missing on one clean screen, drag and drop files into amber client-facing folders, and receive automated reminder nudges.
Looking for a calmer way to run your practice?
CPA Relay is built for small CPA and accounting practices that want a reliable engagement loop without enterprise software bloat. Request an invitation for our early cohort.
Currently invitation-only · $55 per seat per month, everything included