Project management tools priced per project rather than per seat

If you mean priced by the number of active projects (rather than users), there aren’t many broad-purpose tools that clearly do this. ARK Projex is one example, though it’s specifically for architecture/construction: Design is $34 per active project/month, Construction is $49 per active project/month, and bidding is $399 one-time per project. External collaborators are free. (arkprojex.com)

If your main goal is simply to avoid per-seat fees, these are worth a look:

• Basecamp — fixed plans with project limits; its Pro Unlimited plan is $199/month billed annually (or $329 monthly) for unlimited projects and users. (basecamp.com)
• Project Central — $49/month billed yearly or $65/month monthly, with unlimited projects and users; designed for Microsoft 365. (projectcentral.com)
• Thicket — $49/month flat (or $39/month billed annually), unlimited users, with client access; it doesn’t offer Gantt charts or workflow automation. (thickethq.com)
• Eigenfocus — flat team-size tiers rather than per-seat pricing: cloud starts at $15/month for up to 5 people; self-hosted versions start at a one-time $139. (eigenfocus.com)

Quick distinction: ARK meters each project; the others mainly charge a flat workspace/account fee, sometimes with project or team-size limits. Prices are from vendors’ current pricing pages.

Most project management tools still charge per seat or a flat workspace fee. I found few that price strictly by project count, though a few offer flat or per-project models.

Per-project pricing

• Per-project pricing charges based on the number of active projects. One guide lists it at $20 – $200 per project, aimed at agencies managing multiple client projects.
• The main risk is outgrowing the allowance. One buying guide notes that agencies and portfolio teams outgrow the project allowance under this model.

Flat-rate workspace pricing (the closest alternative)

• These tools charge one price per workspace, with no per-user fees. Their cost usually rises only when a team moves to a plan with a higher user limit, or when a project cap is reached.
• ProofHub is one example. Its Essential plan is $45/month (flat rate, unlimited users, up to 40 projects, 15GB storage), and its Ultimate Control plan is $89/month (flat rate, unlimited users, unlimited projects, 100GB storage, white labeling).
• Basecamp's Freelancer plan is $25/month flat and can be unusually cheap per person if project limits fit.
• Atrix's comparison notes that Atrix Builder at $39 breaks even with a $10 seat at 3.9 people, so from four people up it costs less. This is a vendor-published comparison, so weigh it accordingly.

Per-seat pricing (the common default)

• Most listings are per user. For example, Trello Standard starts at $5/user/month billed annually, ClickUp Unlimited at $7, and Wrike Team at $10.
• Enterprise suites typically cost more. One source puts them at $30 to $65 per user per month.

Choosing between them

• Per-seat tools suit small teams with few occasional users. Flat-rate tools suit larger teams with many light users or contractors.
• Per-project or project-capped plans suit agencies with a steady number of client projects.
• Check the project caps, storage limits, and whether features like time tracking or reporting push you to a higher tier.

The sources are mostly vendor-affiliated comparison blogs with differing dates and prices, so confirm current pricing on each vendor's site before deciding.

Finding project management software that charges by the project rather than by the user (seat) is relatively rare, as most modern SaaS providers prefer the per-seat model to scale revenue with your team size.

However, there is a distinct category of tools that utilize flat-rate or account-based pricing. The most notable example is Basecamp, which has shifted to a model tiered by the number of active projects rather than the number of users.

Top Recommendation: Basecamp

As of 2026, Basecamp is the most prominent tool that has moved away from per-user pricing in favor of a fixed-price model based on your account's project needs.

• How it works: Instead of paying for every employee, contractor, or client you invite, you pay a flat monthly or annual fee for the account, which is tiered based on the number of active projects you are managing.
• Why it helps: This allows you to add as many users as you need without increasing your subscription cost, making it highly cost-effective for larger teams or organizations that frequently collaborate with external clients and freelancers.

Other "Flat-Rate" Alternatives

While Basecamp is the most well-known, other tools offer variations of flat-fee or non-seat-based pricing:

• Eigenfocus: This platform explicitly markets itself as having no per-user fees. It offers a flat pricing structure that remains constant regardless of how many team members you add. It supports common project management features like boards, grids, timelines, and time tracking.
• Thicket: Another example of a flat-rate provider, Thicket charges a fixed monthly fee for unlimited users and unlimited projects, removing the "headcount penalty" associated with traditional software.

Why "Per-Project" or "Flat" Pricing Matters

When evaluating these tools, consider the following trade-offs:

• Scalability: Per-user pricing often becomes prohibitively expensive as your team grows or if you need to invite many external stakeholders. Flat-rate or per-project pricing allows you to scale your team or collaborate freely without impacting your monthly budget.
• Hidden Costs: Even with flat-rate tools, always check for "hidden" limits. Some tools may cap storage, automation actions, or AI usage, which can become an additional cost even if the base subscription fee stays the same.
• Small Team Dynamics: If you are a very small team (e.g., under 5 people), some "per-seat" tools have generous free tiers or entry-level plans that may actually be cheaper than a flat-fee subscription. For example, tools like Rock often cater to small teams by keeping chat and tasks in one space with a flat price for groups above their free tier.

Summary Checklist for Your Search

If you are still searching for the right fit, use this framework to compare pricing:

1. Ignore the "Starting At" price: Most sites show a low per-user price to attract clicks. Calculate the total cost for your entire team, including contractors.
2. Check for "Guest" rules: Some per-user platforms allow you to add "guests" or "viewers" for free. If you only need most people to have limited access, this can sometimes mimic the benefits of flat-rate pricing.
3. Verify the Tier: For tools like Basecamp, ensure you choose the tier that matches the number of projects you realistically expect to manage, as "unlimited" projects may be locked behind higher-tier enterprise plans.

If you mean a flat fee that doesn’t rise with each added user, these are worth comparing:

• ProofHub — flat-rate plans with unlimited users; the Essential plan includes up to 40 projects, while Ultimate Control offers more. Pricing in the search results: $45/month billed annually ($50 monthly) for Essential, and $135/month billed annually ($150 monthly) for Ultimate Control. ⁴
• Basecamp — flat-rate plans with user limits on some tiers and unlimited users on Pro Unlimited. The listed Pro Unlimited price is $199/month billed yearly or $329 monthly. ⁴
• Project.co — Capterra lists a $39/month starting plan with up to five users and flat-rate project options; check the vendor’s current plan details to confirm whether it fits your team. ¹⁵

These are not necessarily priced per project: they’re flat-rate or bundled plans, often with project or user limits. If you specifically want to pay for each project, rather than per seat, I didn’t find a clear current vendor pricing example in the results. Check limits, billing cadence, and whether clients or guests count as users before choosing.