OpenProject vs Stacks Comparison
OpenProject
Starting at Contact for pricing
- Free Trial
- Freelancers / Consultants
- Large Enterprises
OpenProject is a collaborative project management software for planning, tracking, and reporting on projects. It emphasizes usability – before users start a project, they need a tool that enables them to start working ef…
Stacks
Starting at Contact for pricing
- Large Enterprises
- Small Business
Stacks is a web application that allows you to manage your projects and tasks. You can use it to build and manage complex projects with a lot of details, without worrying about project software license fees. Stacks is bu…
OpenProject leads on user satisfaction with a 4.2-star rating across 61 reviews.
OpenProject vs Stacks — at a glance
| Feature | OpenProject | Stacks |
|---|---|---|
| Rating | 4.2 / 5 | — |
| Reviews | 61 | — |
| Starting price | Contact for pricing | Contact for pricing |
| Free trial | Yes | No |
| Free version | No | No |
| Best for | Freelancers / Consultants, Large Enterprises, Medium Business | Large Enterprises, Small Business, Medium Business |
| Category | Project Management Software | Bookmark Managers |
| Platforms | SaaS/Web/Cloud, Installed - Mac | Browser Based (Cloud) |
| API | Available | — |
| Support modes | Business Hours, Online | Online |
| Certifications | — | — |
| Data residency | Global | Global |
Key differences between OpenProject and Stacks
- Free trial: OpenProject offers a free trial; Stacks does not.
- Target audience: OpenProject is built for Freelancers / Consultants and Large Enterprises, while Stacks targets Large Enterprises and Small Business.
- Deployment: OpenProject supports SaaS/Web/Cloud, Installed - Mac; Stacks supports Browser Based (Cloud).
OpenProject vs Stacks — find the better fit before you commit.
Which tool fits your team best
Which is actually cheaper for your team size
Where each product wins, per real buyers
Most Project Management Software tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.
Biggest differences
Features
Pricing
Buying details
Security
Buyer feedback
Integrations
Product tour
Other options
Talk to an expert Talk to an expert | Talk to an expert Talk to an expert |
Biggest differences
Start here before you go deeper into features.
Freelancers / Consultants, Large Enterprises, Medium Business
Best for managing complex projects and tasks without license fees.
- You need to manage detailed, multi-faceted projects efficiently.
- You prefer a fast, reliable web app built on Google App Engine.
- You want to avoid paying software license fees for project management.
- You require extensive user reviews or community feedback for decision-making.
- You need advanced integrations or features not mentioned in the basic description.
OpenProject typically suits Freelancers / Consultants and Large Enterprises. Stacks tends to fit Large Enterprises and Small Business better. The right choice depends on your team size, workflow, and whether a free trial matters.
Description | OpenProject is a collaborative project management software for planning, tracking, and reporting on projects. It emphasizes usability – before users start a project, they need a tool that ... Read More about OpenProject | Stacks is a web application that allows you to manage your projects and tasks. You can use it to build and manage complex projects with a lot of details, without worrying about project ... Read More about Stacks |
|---|---|---|
Free Trial Availability |
| |
Spotsaas ScoreWhat's this? ↗ | 8.8/10 | Not Available |
User RatingsBased on verified Spotsaas reviews | ||
Best Company Size | 10 to 500 employees | — |
Get pricing help | Get pricing help |
Where each option fits best
See where each product is strongest, which teams it fits, and what causes buyers to keep looking — before you commit.
Based on buyer reviews and verified product data collected by Spotsaas.
Key strengths
- Comprehensive Project Management Features: OpenProject offers a wide range of tools, including Gantt charts, task management, time tracking, and agile boards, supporting various project management methodologies.
- Open-Source Flexibility: As an open-source platform, OpenProject allows organizations to customize the software to meet their specific needs, providing flexibility in workflows and integrations.
- Collaborative Tools: The platform includes features like forums, wikis, and document sharing, fostering effective team collaboration and knowledge sharing throughout the project lifecycle.
No key benefits available yet.
Best fit
- 10 to 500 employees
- Construction, Engineering, IT Services, Education, Nonprofit Organizations
- Project Managers, Team Leads, Operations Managers, IT Project Coordinators, Construction Managers
No best-fit guidance available yet.
Reasons buyers look elsewhere
- Organizations seeking dedicated customer service and guaranteed uptime may opt for commercial project management solutions that offer 24/7 support and service level agreements.
- Teams relying on a diverse set of tools might prefer platforms that offer a wide range of pre-built integrations with third-party applications to streamline workflows.
- Companies managing large teams and complex projects may look for software that provides advanced resource allocation, forecasting, and utilization tracking capabilities.
No alternatives guidance available yet.
Software Demo
Demo |
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How do OpenProject and Stacks Compare on Features?
Total Features | 22 Features | 0 Features |
|---|---|---|
Unique Features | No unique features | No features |
Get Quote | Get Quote |
Compare OpenProject and Stacks on pricing
Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.
Pricing Option | ||
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Pricing Page |  |  |
Other Details
Organization Types supported |
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Platforms Supported |
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Modes of support |
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API Support |
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Get help choosing | Get help choosing |
Security & Compliance
Certifications, data handling, and security controls for IT and compliance evaluators.
HIPAA | ✗ No | ✗ No |
|---|---|---|
Data Residency | 🌐 Global | 🌐 Global |
OpenProject User Reviews & Rating Comparison
User Ratings | No reviews available for the product | |
|---|---|---|
Rating Distribution | No reviews available for this product | |
Spotsaas Editor’s POV generated by AI | Buyer sentiment Buyer sentiment is positive across 17 reviews, with strong overall satisfaction. What buyers like
Common complaints
| What buyers like
Common complaints
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Pros and Cons |
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Positive Reviews | No reviews available for the product | No reviews available for the product |
| Negative Reviews | No reviews available for the product | No reviews available for the product |
List of Customers
Customers |  Bahn  Suelzle Kopf  Nokia |  StreetEasy  HARDVARD UNIVERSITY  Manage |
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Media and Screenshots
Screenshots |  5 Screenshots | No screenshots available. |
|---|---|---|
Videos |  3 Videos |  2 Videos |
Top Alternatives to OpenProject and Stacks in 2026
Alternatives |
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Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].
Frequently asked questions
- Which is better, OpenProject or Stacks?
- OpenProject edges out the other on user ratings (4.2 vs -1.0). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
- Do OpenProject and Stacks offer a free trial?
- OpenProject offers a free trial. Stacks does not.
- What is the starting price of OpenProject vs Stacks?
- OpenProject starts at Contact for pricing. Stacks starts at Contact for pricing.
- What are the top alternatives to OpenProject?
- Top alternatives to OpenProject include Quickbase , Smartsheet, ClickUp, Freshbooks, Jira.
- What are the top alternatives to Stacks?
- Top alternatives to Stacks include Wrike, Smartsheet, Teamwork, ProjectManager.com, Microsoft Project.