What AI assistants actually recommend when buyers ask about open-source project management software — measured on a rolling 4-week window across 4 engines, published as open data.
Updated 2026-09-18 · 28 sampled answers · rolling 4-week window · methodology
Rankings are measured from sampled AI answers — never editorial, never paid. Orbator builds AI-visibility tooling; when Orbator itself appears in any category, it is measured by the same rules as everyone else.
Measured by Orbatormethodology owner Henrik Tellewindow ends Sep 18, 2026
Sample: 28 AI answers · Window: Aug 21, 2026 – Sep 18, 2026 (4-week rolling) · trend vs prior 4 weeks (98 answers)
Samples by engine: GEMINI 7 (last run Sep 5, 2026) · CHATGPT 7 (last run Sep 5, 2026) · CLAUDE 7 (last run Sep 6, 2026) · PERPLEXITY 7 (last run Sep 5, 2026) · GROK 0 (last run Aug 15, 2026 — stalest)
How these numbers are made: sampling design · prompt provenance · what counts as a mention · what we cannot see
On the record: This ranking is frozen as a dated snapshot every day. View this category's history to see what entered and left the ranking and when, or read what the engines actually said on a given day.
Across 28 sampled AI answers from 4 engines, OpenProject is recommended most often — appearing in 89.3% of recommendations, followed by Taiga (75%) and Plane (67.9%).
This is a measurement of share of voice across 4 AI engines — not an editorial pick. See the full ranking below.
Orbator asked Gemini, ChatGPT, Claude and Perplexity buyer questions about open-source project management software and sampled 28 answers between Aug 21, 2026 and Sep 18, 2026. Recommendation share counts the answers that recommended or listed a product, so a passing mention or a warning adds nothing to it. A category publishes once it holds at least 20 independently sampled answers in the window. Read the full methodology or download this ranking as CSV.
Buyer prompts in this window split across four intents. In best_in_category, with 27 runs, OpenProject led at 92.6%, ahead of Taiga at 85.2% and Plane at 81.5%. In recommendation, with 18 runs, OpenProject led at 88.9%, with Plane and Taiga both at 50%. In alternatives, with 9 runs, Jira, OpenProject and Taiga each hit 100%. In problem_solving, with 9 runs, OpenProject and Plane both reached 88.9%.
Two products in the top five carry a verified pricing fact. OpenProject lists Basic: $5.95 a month (free tier available), last verified 2026-09-05. Taiga lists Taiga: Free, last verified 2026-09-05. Jira and Redmine have no pricing fact recorded. If the shortlist question is migration off a cloud tool, the problem_solving figures are the closest match; if it is a remote engineering team, Plane, Taiga and Jira each answered that prompt in 9 of 9 runs.
| # | Product | Share | Trend | Engines | |
|---|---|---|---|---|---|
| 1 | openproject.org | 89.3% 95% CI 72.8–96.3% 25 mentions · avg pos 1.8 first pick 52% | — | GEMINI 85.7%CHATGPT 85.7%CLAUDE 85.7%PERPLEXITY 100% | Claim |
| 2 | taiga.io | 75% 95% CI 56.6–87.3% 21 mentions · avg pos 3.9 first pick 0% | — | GEMINI 71.4%CHATGPT 85.7%CLAUDE 57.1%PERPLEXITY 85.7% | Claim |
| 3 | plane.so | 67.9% 95% CI 49.3–82.1% 19 mentions · avg pos 3.6 first pick 5.3% | — | GEMINI 42.9%CHATGPT 85.7%CLAUDE 85.7%PERPLEXITY 57.1% | Claim |
| 4 | redmine.org | 60.7% 95% CI 42.4–76.4% 17 mentions · avg pos 5.4 first pick 0% | — | GEMINI 85.7%CHATGPT 14.3%CLAUDE 57.1%PERPLEXITY 85.7% | Claim |
| 5 | Jira | 46.4% 95% CI 29.5–64.2% 13 mentions · avg pos 2.5 first pick 23.1% | — | GEMINI 42.9%CHATGPT 57.1%CLAUDE 42.9%PERPLEXITY 42.9% | Claim |
| 6 | vikunja.io | 28.6% 95% CI 15.3–47.1% 8 mentions · avg pos 4.1 first pick 12.5% | — | GEMINI 28.6%CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 28.6% | Claim |
| 7 | leantime.io | 25% 95% CI 12.7–43.4% 7 mentions · avg pos 4.9 first pick 0% | — | GEMINI 28.6%CHATGPT 57.1%PERPLEXITY 14.3% | Claim |
| 8 | linear.app | 21.4% 95% CI 10.2–39.5% 6 mentions · avg pos 2.3 first pick 16.7% | — | GEMINI 14.3%CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 14.3% | Claim |
| 9 | docker.com | 21.4% 95% CI 10.2–39.5% 6 mentions · avg pos 2.7 first pick 50% | — | GEMINI 42.9%CHATGPT 28.6%PERPLEXITY 14.3% | Claim |
| 10 | trello.com | 21.4% 95% CI 10.2–39.5% 6 mentions · avg pos 7.6 first pick 0% | — | GEMINI 14.3%CHATGPT 28.6%CLAUDE 28.6%PERPLEXITY 14.3% | Claim |
| 11 | gitlab.com | 17.9% 95% CI 7.9–35.6% 5 mentions · avg pos 2 first pick 0% | — | GEMINI 14.3%CHATGPT 14.3%CLAUDE 42.9% | Claim |
| 12 | microsoft.com | 14.3% 95% CI 5.7–31.5% 4 mentions · avg pos 8.5 first pick 0% | — | GEMINI 28.6%CHATGPT 14.3%CLAUDE 14.3% | Claim |
| 13 | wekan.io | 14.3% 95% CI 5.7–31.5% 4 mentions · avg pos 10 first pick 0% | — | GEMINI 14.3%CHATGPT 14.3%CLAUDE 28.6% | Claim |
| 14 | odoo.com | 10.7% 95% CI 3.7–27.2% 3 mentions · avg pos 7.3 first pick 0% | — | GEMINI 28.6%CLAUDE 14.3% | Claim |
| 15 | kanboard.org | 10.7% 95% CI 3.7–27.2% 3 mentions · avg pos 11 first pick 0% | — | GEMINI 14.3%CHATGPT 14.3%CLAUDE 14.3% | Claim |
| 16 | worklenz.com | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 1 first pick 100% | — | GEMINI 14.3%PERPLEXITY 14.3% | Claim |
| 17 | asana.com | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 2.5 first pick 0% | — | GEMINI 14.3%CLAUDE 14.3% | Claim |
| 18 | kubernetes.io | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 5 first pick 0% | — | CHATGPT 14.3%PERPLEXITY 14.3% | Claim |
| 19 | todoist.com | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 9 first pick 0% | — | GEMINI 14.3%CHATGPT 14.3% | Claim |
| 20 | focalboard.com | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 17 first pick 0% | — | GEMINI 14.3%PERPLEXITY 14.3% | Claim |
| 21 | mattermost.com | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 17.5 first pick 0% | — | GEMINI 14.3%PERPLEXITY 14.3% | Claim |
| 22 | projectlibre.com | 7.1% 95% CI 2–22.6% 2 mentions · avg pos 24.5 first pick 0% | — | GEMINI 28.6% | Claim |
| 23 | activecollab.com | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 2 first pick 0% | — | GEMINI 14.3% | Claim |
| 24 | clickup.com | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 2 first pick 0% | — | CLAUDE 14.3% | Claim |
| 25 | planisware.com | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 3 first pick 0% | — | GEMINI 14.3% | Claim |
| 26 | todo.microsoft.com | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 3 first pick 0% | — | CHATGPT 14.3% | Claim |
| 27 | Orangescrum | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 4 first pick 0% | — | GEMINI 14.3% | Claim |
| 28 | ProjeQtOr | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 5 first pick 0% | — | PERPLEXITY 14.3% | Claim |
| 29 | baserow.io | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 6 first pick 0% | — | GEMINI 14.3% | Claim |
| 30 | Tuleap | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 6 first pick 0% | — | CHATGPT 14.3% | Claim |
| 31 | kendomanager.com | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 12 first pick 0% | — | GEMINI 14.3% | Claim |
| 32 | notion.so | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 26 first pick 0% | — | GEMINI 14.3% | Claim |
| 33 | Planka | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 29 first pick 0% | — | GEMINI 14.3% | Claim |
| 34 | GanttProject | 3.6% 95% CI 0.6–17.7% 1 mentions · avg pos 32 first pick 0% | — | GEMINI 14.3% | Claim |
| 35 | Huly | 3.6% 95% CI 0.6–17.7% 1 mentions first pick 0% | — | CLAUDE 14.3% | Claim |
Reading the numbers: Share is a point estimate on 28 sampled answers, so each row also shows its 95% CI — the Wilson score interval around that share. When two products' intervals overlap, the gap between them isn't statistically meaningful at this sample size. First pick is the share of a product's recommending answers where it was named first, which separates “always mentioned” from “usually the top recommendation”. Full methodology.
Independence: Orbator customers are badged for disclosure. Customer status does not affect prompts, sampling, extraction, or ranking — see the methodology. Your product on this list? Claim it to see the prompts behind your rank and track it weekly.
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Head-to-head pages for products ranked in Open-source project management software. Each one sets out sourced facts side by side, plus which product AI assistants recommend more, engine by engine.
OpenProject ranked first with a recommendation share of 92.1% of 63 sampled answers in the 4-week window to 2026-09-05. Its breakdown shows 39 recommended and 19 listed, with 3 in context. Across engines it ran from 100% of Claude's 7 answers, 100% of Grok's 7 answers and 100% of Perplexity's 14 answers down to 78.6% of Gemini's 14 answers. Pricing fact: Basic: $5.95 a month (free tier available), last verified 2026-09-05.
Plane ranked second and over-indexed on the prompt for the best open-source project management tool for a remote engineering team, recommended in 100% of those 9 runs. Overall the split was 33 recommended and 14 listed, plus 11 in context. Engine spread ran from 85.7% of Grok's 7 answers and 85.7% of ChatGPT's 21 answers to 57.1% of Gemini's 14 answers.
Taiga ranked third on the same remote engineering team prompt, at 100% of 9 runs. Its split was 25 recommended and 22 listed, with 7 in context. It reached 85.7% of Grok's 7 answers and fell to 28.6% of Claude's 7 answers. Pricing fact: Taiga: Free, last verified 2026-09-05.
Jira ranked fourth, also topping the remote engineering team prompt at 100% of 9 runs, with 20 recommended and 17 listed. It ran from 85.7% of Grok's 7 answers to 42.9% of Gemini's 14 answers and 42.9% of Perplexity's 14 answers.
Redmine ranked fifth and over-indexed on open-source project management alternatives to popular enterprise PM suites, at 100% of 9 runs. Its split was 14 recommended and 18 listed. It reached 78.6% of Perplexity's 14 answers and 19% of ChatGPT's 21 answers.
All five engines recommended the same product most among the top five. OpenProject led for Claude across 7 answers, for Gemini across 14 answers, for Grok across 7 answers, for ChatGPT across 21 answers and for Perplexity across 14 answers. No engine in this window put a different product at the top of that group.
The widest gap between engines belonged to Redmine. ChatGPT recommended it in 19% of its 21 answers, Perplexity in 78.6% of its 14 answers, a spread of 59.6 points. Taiga also split sharply, at 28.6% of Claude's 7 answers against 85.7% of Grok's 7 answers. Claude and Grok each ran 7 answers in this window, so single-engine shares for those two rest on a small base.
This is the first measured window on record for the category. It covers 2026-08-08 to 2026-09-05, 28 days, with 63 sampled answers across five engines and 45 ranked products. There is no prior window to compare against, so no entries, exits or share changes are reported here.
OpenProject leads the window at 92.1% of 63 sampled answers, and was first-named in 28 runs, a first-recommendation rate of 48.3%. Plane and Taiga follow, both at 74.6% of 63 sampled answers, with first-recommendation rates of 23.4% and 4.3%. Jira sits at 58.7% and Redmine at 50.8%, on the same 63 answers. Redmine's average position was 6, the lowest of the five. The next window will give the first movement figures for these ranks.
Every number on this page is measured from sampled answers, and those answers are kept. The archive holds dated excerpts of what each engine answered, never full answers. Read the answer archive for open-source project management software to see the excerpts by date and engine, or view the ranking history to see what entered and left this ranking and when.
Across 28 sampled AI answers from 4 engines (Aug 21, 2026 to Sep 18, 2026), OpenProject is recommended most often for open-source project management software, appearing in 89.3% of recommendations, followed by Taiga (75%). This is a measurement of what AI assistants recommend, not an editorial verdict.
ChatGPT recommends OpenProject most often for open-source project management software. It appears as a recommendation in 85.7% of ChatGPT's sampled answers in this window (Aug 21, 2026 to Sep 18, 2026). Other engines answer differently. The per-engine breakdown in the ranking shows each one.
Orbator samples AI answers to buyer questions across 4 engines and counts how often each product is recommended. No product pays for placement. The open-source project management software ranking is based on 28 answers in the current 4-week window (Aug 21, 2026 to Sep 18, 2026). Full methodology is published at https://www.orbator.io/ai-index/methodology.
Verified facts for the most-recommended products — each sourced and dated. No editorial scoring, just the data side by side.
| OpenProjectopenproject.org | Taigataiga.io | Planeplane.so | Redmineredmine.org | Vikunjavikunja.io | |
|---|---|---|---|---|---|
| Pricing | Basic: $5.95 a month (free tier available) ↗ sourceverified Sep 5, 2026 | Taiga: Free ↗ sourceverified Sep 5, 2026 | — | — | Self-Hosted: Free ↗ sourceverified Sep 5, 2026 |
| Features | Calendar ↗ sourceverified Sep 5, 2026 | Kanban board ↗ sourceverified Sep 5, 2026 | Project management ↗ sourceverified Sep 5, 2026 | Multiple projects support ↗ sourceverified Sep 5, 2026 | Reminders & repeating tasks ↗ sourceverified Sep 5, 2026 |
| Platforms | API ↗ sourceverified Sep 5, 2026 | — | Windows ↗ sourceverified Sep 5, 2026 | Web ↗ sourceverified Sep 5, 2026 | Docker ↗ sourceverified Sep 5, 2026 |
| Integrations | Nextcloud ↗ sourceverified Sep 5, 2026 | Zapier ↗ sourceverified Sep 5, 2026 | Figma ↗ sourceverified Sep 5, 2026 | Subversion ↗ sourceverified Sep 5, 2026 | Todoist ↗ sourceverified Sep 5, 2026 |
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