“Best Open-Source ClickUp Alternatives in 2026”

What should you compare before you leave ClickUp?

open-source ClickUp alternatives is a key topic in modern project management and teamwork. Compare four things, not forty: workflow parity, licence obligations, the real cost of running the server, and the cost of moving your data out. Everything else in a feature matrix is noise at this stage.

ClickUp earns its place by being wide. Tasks, docs, goals, chat, whiteboards, time tracking, and dashboards sit in one product, and the free plan does not cap members. Teams leave for three reasons that have nothing to do with that breadth: the workspace gets slow at scale, the configuration surface is large enough to stall onboarding, and the bill per person is hard to defend when only a third of the team logs in weekly.

An open-source replacement fixes the bill and the data-ownership question. It does not fix the configuration surface, and it adds an operating burden. So the honest framing is not “free versus paid”. It is “subscription versus a small internal platform”, and small internal platforms have owners, patch windows, and an on-call rota.

The four tests below are worth running before you install anything.

Which open-source tools are actually ClickUp alternatives in 2026?

Six tools are worth a pilot, and each replaces a different part of ClickUp rather than the whole thing. The table lists public list prices checked in November 2026; treat them as a starting point, not a quote.

Two names that appear in most listicles deserve a warning. Focalboard has been in maintenance mode rather than active development, so plan a migration path before you standardise on it. Huly is genuinely capable and open source, but it is an all-in-one suite that expects you to adopt its own chat, video, and HR modules — a bigger commitment than replacing a task tool.

If your team already lives inside a documentation culture, Plane is the closest thing to a drop-in: it imports ClickUp spaces, keeps cycles and modules, and its keyboard-first interface feels modern rather than administrative. If your work has budgets, Gantt dependencies, and time-and-cost reporting, OpenProject is the only shortlisted tool that treats those as first-class.

Why do the licences matter more than the feature list?

Because a permissive-looking licence can still constrain how you ship, and a copyleft licence can quietly disqualify a product you intended to resell.

All six tools let a company run the software internally at no licence cost. The differences appear the moment you modify the code or expose it to third parties.

AGPL-3.0 (Plane, Leantime, Taiga, Planka). Running it internally is fine. If you modify it and let people use that modified version over a network, you must offer them the source. For an internal PM tool that never leaves your VPN, this is a non-issue. For an agency that wants to host a branded workspace for clients, it is a design constraint: either publish your changes or keep them out of the network path.

GPLv3 (OpenProject). Distribution of a modified binary triggers source obligations. Internal use does not. Plugins that link tightly to the core inherit the same obligations, which is why the paid editions exist as add-ons rather than forks.

GPL-2.0 (Redmine). Same family, older text, and a mature plugin ecosystem that has absorbed two decades of edge cases. Many Redmine plugins are commercial, so “free core” does not always mean “free configuration”.

MIT (Kanboard). Do almost anything, keep the notice. The trade-off is not legal but practical: a small maintainer base means you own the roadmap.

The procurement consequence is concrete. Open-source licences satisfy “no per-seat fee” and “source code available”, which is often enough for a public-sector or regulated buyer. They do not satisfy “vendor will patch a critical CVE within 48 hours” unless you buy the Enterprise tier or staff the on-call rota yourself. That is the line item most business cases forget.

What does self-hosting cost at 40 people?

It costs about $8,480 in year one, which is slightly more than the $8,220 ClickUp Business would charge for the same 40 people — and the gap only closes if you keep admin time under 5.4 hours a month.

Here is the full model for a 40-person product team running Plane Community on their own infrastructure. The rates are illustrative but realistic for a mid-size cloud account in 2026: two application nodes, a managed Postgres instance, object storage for attachments, and daily off-site backups.

The arithmetic behind the headline: 40 seats × $12 × 12 months = $5,760. Five admin hours a month is 60 hours a year, and 60 × $70 = $4,200, which is 73% of the ClickUp subscription on its own. In year two, with migration costs gone, the self-hosted total drops to $6,680 against $7,020 — a 5% saving, inside the noise of any procurement decision.

The break-even is worth stating as a rule. Take the SaaS annual cost, subtract infrastructure and patching, and divide by your loaded hourly rate:

(7,020 − 1,500 − 420 − 560) ÷ 70 ÷ 12 = 5.4 hours a month

Above 5.4 admin hours a month, ClickUp is cheaper in cash. Most 40-person deployments with SSO, backups, and quarterly upgrades land between four and eight hours, which is exactly why the answer flips depending on who is counting.

What does the same switch cost a 15-person studio?

At 15 people it costs more than ClickUp, by a wide margin, and that is the case worth admitting early.

A 15-person design studio on ClickUp Unlimited pays 15 × $7 × 12 = $1,260 a year. The same studio running OpenProject Community pays nothing for the licence but roughly $780 in hosting, plus three admin hours a month at $60 ($2,160), plus about $300 for patching and a staging environment. Total: $3,240.

Buying the supported edition does not rescue the math, because OpenProject’s Basic tier starts at 25 users: 25 × €5.95 = €148.75 a month, or about €1,785 a year, which is roughly $1,930 before you add two admin hours a month ($1,440). That lands near $3,370.

So the studio pays 2.6× more for a tool with fewer integrations and no mobile app worth the name. The justification cannot be money. It has to be something else: a client contract that forbids offshore SaaS, a partner who wants the source escrowed, or a genuine requirement to run the workspace on hardware the studio controls. If none of those apply, the honest recommendation is to stay on the hosted plan and spend the difference on a project manager’s time.

When does open source actually beat ClickUp on cash?

It beats ClickUp when seats are numerous, the governance features you need are in the free edition, and you already employ someone who patches servers.

Take a 150-person engineering organisation that cannot send project data to a US SaaS vendor. ClickUp Business would be 150 × $12 × 12 = $21,600 a year, but it fails the policy test, so it is not really an option.

OpenProject Premium, which includes SSO and the Enterprise add-ons a security review will ask about, is priced at €15.95 per user per month with a 100-user minimum: 150 × €15.95 × 12 = €28,710, roughly $31,000 a year.

The Community edition with Keycloak in front for single sign-on looks cheaper: about €5,040 a year in infrastructure ($5,450), 12 admin hours a month at €75 ($11,670), and 45 hours a year of upgrade and CVE work ($3,650). That is $20,770 recurring, plus a one-off migration near $12,000.

Three numbers, three conclusions:

• Against the Enterprise tier, self-hosting Community saves roughly $10,000 a year — real money, and the reason many regulated teams go this route.
• Against an impossible SaaS option, the comparison is meaningless; the constraint is the decision.
• Against ClickUp’s list price, self-hosting is only 4% cheaper while carrying all the operational risk.

That last point is the one procurement decks leave out. You are not buying software at $20,770. You are buying software plus an availability commitment you now own, and the cost of a two-day outage during a release window can exceed a year of licence fees.

Which tool fits which team?

Match the tool to the shape of your work, then check the licence and the operating model. A tool that fits the workflow badly will be abandoned regardless of price.

OpenProject — for delivery with budgets and dependencies. Gantt with automatic scheduling, baselines, time and cost tracking, budgets, and a work breakdown structure. It is the closest open-source analogue to a classic PMO tool, and the only one here where “cost to complete” is a native report. Choose it if you answer to a funder, a client, or a CFO.

Plane — for product teams that live in issues. Cycles, modules, estimates, intake, and a wiki that is good enough to replace a separate docs tool for small teams. The ClickUp importer is real, which lowers the switching cost. Choose it if your work is a backlog and your reporting needs are a burndown and a weekly update.

Leantime and Taiga — for teams of five to twenty. Both assume a single product and a small number of stakeholders. Leantime adds goals and time tracking; Taiga is the cleaner Scrum implementation with a decent backlog and sprint board. Neither pretends to run a portfolio.

Redmine — for the long tail. Tickets, custom fields, workflows, and a plugin for almost everything, including time tracking and knowledge bases. If you need a system that will still be understandable in 2032 and can tolerate a 2010s interface, Redmine is the lowest-risk bet.

Planka and Kanboard — for boards and nothing else. Kanboard’s automatic actions are surprisingly powerful for a tool with no database of its own beyond SQLite or MySQL. Planka is the better-looking Trello clone. Neither will give you a timeline, workload, or cross-project reporting, so do not choose them expecting ClickUp’s “everything app” behaviour.

What are the trade-offs nobody puts in the comparison table?

The trade-offs are operational: you trade a subscription for ownership, and ownership includes the parts of the job nobody enjoys.

Automation depth. ClickUp’s automations are shallow per rule but broad in triggers. Open-source tools either lack them (Community editions often gate custom actions) or expose them as workflow transitions that an admin must model. A team that runs 40 automations will feel this immediately.

Mobile and offline. This is the weakest area across the shortlist. Field teams and executives who check status on a phone will notice, and “use the web app” is not an answer that survives a quarter.

Reporting that answers questions. ClickUp’s dashboards are mediocre and still better than most open-source equivalents. Expect to export to a spreadsheet or a BI tool for anything beyond a filtered list.

Upgrade cadence. Self-hosted means you own the CVE response. A minor release every six weeks is manageable; a critical advisory on a Friday before a launch is not, unless someone is on call.

The AI gap. ClickUp ships AI features as a paid add-on. Open-source equivalents are earlier and less integrated. If AI task generation is genuinely part of your workflow, price the add-on before assuming open source is free.

Hiring and onboarding. New joiners have used ClickUp, Asana, or Jira. Almost none have used OpenProject. Budget an extra half-day per person in the first month, and write the internal guide nobody wants to write.

What mistakes do teams make when migrating?

They migrate the tool instead of the workflow, and they underestimate how much of the old workspace was actually documentation.

Copying every field. A 40-field ClickUp workspace imported verbatim produces an unusable form. Move the ten fields people filter on, and archive the rest as read-only.

Ignoring attachments. Attachments are where migrations quietly fail: file sizes, permissions, and links inside comments. Test with 200 real items before committing.

Skipping the parallel run. Two weeks of running both tools, with one project duplicated, surfaces the missing view before it becomes an outage.

Treating the pilot as free. A pilot needs a named owner, a success criterion, and a stop date. Otherwise it becomes a shadow system that nobody shuts down.

Forgetting the export test. Before you commit, export the open-source tool’s data and confirm you can read it elsewhere. If the export is a partial CSV of titles, you have not bought an exit.

Where does Doitify fit if you want ClickUp’s surface without a server?

Doitify is our product, so read this as disclosure rather than a review. It is a hosted workspace with projects, tasks, sub-tasks, checklists, owners, due dates, Kanban, Gantt, roadmaps, calendars, workload views, reports, automations, import and export, and Doitify Copilot for turning a goal into a plan.

The relevant comparison is architectural. Open-source tools put the licence decision in front of you and the operating cost behind you. A hosted workspace keeps both on the vendor’s side of the line, at the cost of a per-seat fee and a data-processing agreement. For a 15-person studio that wants ClickUp breadth without self-hosting, that trade is usually worth more than the €0 licence. For a 150-person organisation with a residency requirement, it usually is not — and in that case OpenProject or Plane is the better answer, not a sales call.

Conclusion

The open-source ClickUp alternative question has a boring answer that survives contact with a budget: the licence is free, the operation is not. At 15 people, self-hosting costs two to three times the subscription. At 40, it roughly breaks even. At 150, with a residency requirement and an admin who already patches servers, it can save five figures a year.

Choose on the constraint, not the price tag. If the constraint is “no per-seat fee at 200 seats”, take OpenProject or Plane and staff the upgrade window. If the constraint is “we need ClickUp’s breadth without a server”, a hosted workspace is the honest answer, and the €0 licence was never the real prize. Either way, test the export before you sign, because that is the decision you cannot undo.

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