Softwr

Accounting · head to head

Bill.com vs Firefly III

Bill.com logo

Bill.com

Accounting

Automate your financial workflows

From
Free
Rated
-
Full reviewWebsite
Firefly III logo

Firefly III

Personal Finance

Free, open source, self-hosted personal finance manager with double-entry style accounting

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Bill.com limited customization of approval workflows and user permissions for complex business needs; Firefly III there is no official managed hosting, so a non-technical user has no easy on-ramp the way Actual Budget offers with its paid hosted sync.
  • They diverge on capability: Bill.com covers AP automation, Firefly III covers Double-entry style ledger.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Bill.com and Firefly III actually diverge.

Attributes where Bill.com and Firefly III differ
AttributeBill.comFirefly III
Pricing modelUnknownOpen source, no licence fee
PlatformsWebWeb, Linux, Docker
CategoryAccountingPersonal Finance
Founded2006Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bill.com

  • AP automation
  • AR automation
  • Payment processing
  • Approval workflows
  • Document management
  • Vendor management
  • Cash flow insights
  • Mobile approvals

Only in Firefly III

  • Double-entry style ledger
  • Multi-currency accounts
  • Bill and subscription tracking
  • Rule engine
  • Reports and charts
  • API access

What people use each for

The jobs each tool is most often brought in to do.

Bill.com

  • Invoice processingnot Firefly III
  • Bill paymentsnot Firefly III
  • Vendor paymentsnot Firefly III
  • Cash flow managementnot Firefly III
  • Financial automationnot Firefly III

Firefly III

  • A self-hoster already running a home server or NAS who wants their financial ledger on the same infrastructurenot Bill.com
  • Someone who wants double-entry style accuracy rather than simple envelope budgetingnot Bill.com
  • A privacy-focused user who refuses to put financial data on any third-party server, hosted or otherwisenot Bill.com
  • A developer who wants API access to build custom bank import scripts for accounts with no standard connectornot Bill.com

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bill.com

  • Limited customization of approval workflows and user permissions for complex business needs
  • Limited international payment capabilities compared to specialists like Tipalti
  • Customer support response times are slow, with agents often lacking product expertise

Firefly III

  • There is no official managed hosting, so a non-technical user has no easy on-ramp the way Actual Budget offers with its paid hosted sync.
  • The double-entry-influenced model is less intuitive for newcomers than simple envelope budgeting, and the learning curve is real.
  • Automatic bank sync depends on the community-run importer and third-party connectors, and coverage and reliability vary a lot by bank and country.
  • Mobile access is via a web interface rather than a polished native app, which is a step behind Actual Budget or Lunch Money on phones.
  • Because there is no company behind it, security patching and feature development depend entirely on volunteer maintainer time.

Pricing, plan by plan

Bill.com

Free
  • Essentials$49/month
    • Core AP and AR functionality
    • Manual CSV import/export
  • Team$65/month
    • Automatic 2-way sync with QuickBooks Online, Xero
  • Corporate$89/month
    • Procurement features
    • Custom approval policies
    • Sync with NetSuite, Dynamics

Firefly III

Free
  • Firefly IIIFree
    • Full functionality, self-hosted
    • No usage limits
    • Community support, donations accepted

Which should you pick?

Choose Bill.com if

  • You need ap automation.
  • You want to start without paying.
  • You also want ar automation.
Bill.com review

Choose Firefly III if

  • You need double-entry style ledger.
  • You want to start without paying.
  • You work on Web, Linux, Docker.
  • You also want multi-currency accounts.
Firefly III review

Questions people ask

Is Bill.com or Firefly III better?
Neither clearly leads. Bill.com starts at Free and Firefly III at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bill.com or Firefly III?
Bill.com starts at Free and Firefly III at Free.
Does Bill.com or Firefly III run on more platforms?
Bill.com runs on Web. Firefly III runs on Web, Linux, Docker.
Can I use Bill.com for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bill.com best used for?
Bill.com is most often used for invoice processing, bill payments, vendor payments, cash flow management. Of those, invoice processing and bill payments are not what Firefly III is typically brought in for.
What can Bill.com do that Firefly III cannot?
Bill.com covers AP automation, AR automation, Payment processing, Approval workflows. Firefly III covers Double-entry style ledger, Multi-currency accounts, Bill and subscription tracking, Rule engine.

Answered from the vendors’ own pages

Bill.com: What payment methods does Bill.com support?

Bill.com supports ACH transfers, checks, corporate cards, and international transfers. ACH payments cost $0.59 per transaction, checks cost $1.99, and card payments incur a 2.9% fee.

Source
Firefly III: Can I pay someone to host Firefly III for me?

Not through the core project; some third-party providers sell Firefly III hosting independently, but there is no official managed service.

Bill.com: Does Bill.com offer a free tier?

Yes. Bill.com offers a free Spend & Expense plan for access to credit lines from $1,000-$5M with corporate cards, budgets, and expense tracking.

Source
Firefly III: Does it support multiple currencies?

Yes, natively, including accounts and transactions in different currencies.

Bill.com: Which accounting systems does Bill.com integrate with?

Bill.com integrates with QuickBooks Online, QuickBooks Enterprise, Oracle NetSuite, Sage Intacct, Microsoft Dynamics, and Xero, with automatic two-way syncing on most plans.

Source
Firefly III: Is it really free with no paid tier?

Yes, the software is free and open source under the AGPL; the project accepts donations but sells nothing.

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