Firefly IIIA free and open source personal finance manager.
vs
MediusAutonomous AP, powered by agentic AI
Comparison · Expense Management · weekly run Nov 2
Firefly III vs Medius
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Firefly III is the stronger AI pick in Expense Management: it has a visibility score of 0 versus 0 for Medius.
Choose Firefly III if…
No clear advantage in the published data.
Choose Medius if…
- You need ISO 27001:2022 or ISO 9001 or SOC 1 Type 2 or SOC 2 Type 2 or SOC 3 coverage
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Firefly III | Medius |
|---|---|---|
| Visibility score | 0% | 0% |
| Change vs last week | New | New |
| Rank in Expense Management | #31 | #33 |
| Share of voice | 0% | 0% |
| Mentions this run | 0 | 0 |
| Positive in AI answers | — | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Firefly III 0pp · Medius 0pp over 0 weekly runs.
Engine by engine
Firefly III leads on 0 of 3 engines
ChatGPT
AI Mode
Perplexity
Firefly IIIMedius
Head to head in AI answers
0 engine answers name both brands
0Firefly III ranked higher
0Medius ranked higher
Features, pricing & fit
| Dimension | Firefly III | Medius |
|---|---|---|
| Pricing model | — | Flat tiers |
| Entry price | — | Contact sales |
| Free plan | — | No |
| Deployment | Self-hosted: the user installs it and runs it on their own server, with a Docker image available. | 100% cloud-based |
| Compliance | — | ISO 27001:2022, ISO 9001, SOC 1 Type 2, SOC 2 Type 2, SOC 3 |
| Support | — | Standard Support (AP Essentials plan), Customer success team, Educational webinars and excellence program |
| Founded | 2017 | 2001 |
| Headquarters | Netherlands | Linköping, Sweden |
| Employees | — | 501–1,000 |
| Funding | — | Minority stake (private equity, Advent International) |
| Best for | Individuals who want a free, self-hosted personal finance manager. | Midsize and enterprise finance teams, especially product-based industries with high invoice volumes |
Plans side by side
Firefly III
Pricing not available.
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Firefly III vs Medius”, https://slateindex.ai/compare/firefly-iii-vs-medius, data of Nov 2, 2026. Licence: CC BY 4.0.