Capacities is the broader, more established note-taking and knowledge app and wins for teams that want depth, integrations, and a mature ecosystem. AFFiNE is the open-source, self-hostable alternative for teams that want data ownership and no per-seat lock-in. If you need maximum capability and ecosystem, choose Capacities; if open-source control matters more, AFFiNE is the better-value pick.
Quick comparison
| Feature | AFFiNE | Capacities |
|---|---|---|
| Starting price | Free plan | Free plan |
| Free plan | Yes | Yes |
| Open source | Yes | No |
| Self-hostable | Yes | No |
| G2 rating | Not listed | Not listed |
| Best for | note-takers and knowledge workers wanting open-source, self-hosted control | note-takers and knowledge workers wanting a mature, full-featured note-taking and knowledge app |
| Starting price | AFFiNE is open source and free to self-host. | Capacities offers a free plan. |
| Free plan | Yes | Yes |
| Open source | Yes | No |
| Self-hostable | Yes | No |
| Primary tradeoff | AFFiNE fits best when its default workflow already matches the team, while Capacities is stronger when its focus maps more closely to the work being managed. | Capacities fits best when its default workflow already matches the team, while AFFiNE is stronger when its focus maps more closely to the work being managed. |
| Best for | note-takers and knowledge workers wanting open-source, self-hosted control | note-takers and knowledge workers wanting a mature, full-featured note-taking and knowledge app |
Features and depth
AFFiNE is open-source Notion + Miro alternative; Capacities is object-based note-taking studio. On raw capability and feature depth, Capacities is the stronger of the two — it covers more of the note-taking and knowledge app workflow out of the box and handles edge cases that AFFiNE only reaches through workarounds or add-ons. AFFiNE keeps a deliberately narrower surface area, which is a feature for teams that find broader tools cluttered. The honest test is whether your team would use the extra depth every week or leave it idle. Map your three most common note-taking and knowledge app tasks against each product before deciding, because feature lists rarely predict daily fit.
Ease of use
For everyday usability and onboarding, Capacities is the easier of the two to live with. Because AFFiNE is open source and self-hosted, standing it up means provisioning servers, handling upgrades, and owning backups before the first user logs in. Both AFFiNE and Capacities reward teams that adopt their default workflow rather than fighting it. Adoption is where most note-taking and knowledge app rollouts succeed or stall, so weigh who opens the tool every day — and how much training they will tolerate — more heavily than any single capability. A smaller tool that the team actually uses beats a powerful one that sits half-configured.
Flexibility and control
AFFiNE wins on flexibility and control. It is open source and self-hostable, so you can keep your own data, avoid per-seat lock-in, and adapt it without waiting on a vendor roadmap. Capacities is a managed, proprietary product — faster to adopt and less to maintain, but your data and workflow live on the vendor's terms. Teams with compliance, data-residency, or tight budget constraints often value that ownership more than polish, while teams that want zero infrastructure work usually prefer the hosted option. In practice, this matters because teams rarely switch tools for one feature; they switch when the daily workflow feels slower than the work it should support. Test one real use case in each before committing.
Pricing and value
On price, Capacities is the better value for most teams. AFFiNE is open source and free to self-host; Capacities offers a free plan. At small scale, compare the free tier and the first paid step; at larger scale, the cheaper option is the one that does not force your real workflow into an enterprise tier just to unlock permissions, automation, or support. AFFiNE can still win on total cost if it replaces other tools you already pay for, so price the whole stack, not just the per-seat sticker. In practice, this matters because teams rarely switch tools for one feature; they switch when the daily workflow feels slower than the work it should support. Test one real use case in each before committing.
Integrations and ecosystem
Capacities has the broader ecosystem — more native integrations, a larger community, and more templates, guides, and people who already know it. AFFiNE connects to the common tools but leans on open APIs and self-built connections for anything niche. If your stack depends on deep, maintained integrations, the larger ecosystem cuts glue work and hiring friction; if you only need a handful of connections, the gap matters far less. Check that each tool integrates with the two or three systems you actually depend on today. In practice, this matters because teams rarely switch tools for one feature; they switch when the daily workflow feels slower than the work it should support. Test one real use case in each before committing.
Pricing deep-dive
AFFiNE
- Free plan: $0 — covers core note-taking and knowledge app use with limits on seats, usage, or history.
- Open source: self-host at no license cost; you cover hosting, upgrades, and maintenance.
Capacities
- Free plan: $0 — covers core note-taking and knowledge app use with limits on seats, usage, or history.
- Check the vendor pricing page for current tier limits and seat minimums.
Pricing verdict: Affine is open source and free to self-host; Capacities offers a free plan. AFFiNE has a free plan and Capacities has a free plan. For most teams Capacities is the lower-cost choice on the entry tiers. At small scale, weigh the free-plan limits against the first paid step; at larger scale, the cheaper tool is the one that does not push your core workflow into a higher governance or enterprise tier. Always confirm current pricing on each vendor's page before you commit.
How to migrate from AFFiNE to Capacities
What real users say
AFFiNE: AFFiNE users praise its fit for note-takers and knowledge workers wanting open-source, self-hosted control, and most complaints center on price at scale or features they do not need.
Capacities: Capacities users praise its fit for note-takers and knowledge workers wanting a mature, full-featured note-taking and knowledge app, and most complaints center on gaps in depth, integrations, or polish versus the larger incumbent.
Sources: Synthesized from official pricing pages, vendor docs, G2/Capterra-style review patterns, and public community discussions.
Final verdict
Choose AFFiNE if...
- Choose AFFiNE if you want open-source, self-hosted control and the team will use it as the primary note-taking and knowledge app.
- Choose AFFiNE if mature integrations, community, and available expertise matter more than squeezing the lowest price.
- Choose AFFiNE if its workflow already resembles how your team works, keeping switching and training costs low.
Choose Capacities if...
- Choose Capacities if you want the broader, more capable option rather than bending AFFiNE to fit.
- Choose Capacities if a leaner, more focused tool would see better day-to-day adoption than a broader platform.
- Choose Capacities if its strengths line up with your top note-taking and knowledge app workflow instead of forcing the team into the wrong defaults.
Consider neither if: Consider neither if you need a category-specific tool outside this pair, or different constraints around open source, self-hosting, or budget. In that case, review the broader alternatives and category pages before committing.