Loomio is an open-source collaborative decision-making tool centered on threaded discussion and structured proposals with voting (agree, disagree, abstain, block). Groups typically look for an alternative when they need to capture and evaluate the reasoning, not just the vote; open-source civic participation at scale; opinion clustering across very large populations; consent-based decisions; or participatory budgeting. Argumentree captures decisions as hierarchical pro/con argument trees, extracts arguments from transcripts and documents with AI, aggregates participant ratings into consensus scores, keeps a full audit trail, and translates across 66 languages. Decidim, Polis, and CoBudget are open-source; Murmur focuses on consent-based (sociocratic) decisions. The right choice follows your use case, not a single ranking.
An honest roundup of the best Loomio alternatives — open-source and structured-decision options, what each is best for, and how to choose.
Loomio does one thing well: it turns a decision into a threaded discussion plus a proposal with a vote (agree, disagree, abstain, block). Groups start looking elsewhere when they need something it isn't built for — capturing the reasoning behind a decision rather than just the outcome, open-source civic participation at community or city scale, consensus across very large groups, consent-based (sociocratic) decisions, or participatory budgeting. The tools below each cover one of those needs; match the tool to the job rather than chasing a single "best."
A collaborative decision-making platform that captures the reasoning behind a decision, not just the vote. Where Loomio organizes a decision as a discussion thread plus a proposal vote, Argumentree organizes it as a structured pro/con argument tree — with AI extraction from meeting transcripts and documents, participant rating that aggregates into consensus scores, a full audit trail, and translation across 66 languages.
A mature open-source participatory-democracy platform, originally built for the city of Barcelona and now used by governments, cooperatives, and civic organizations. It supports participatory processes, assemblies, proposals, debates, and voting at scale.
An open-source tool for gathering and clustering open-ended opinions from very large groups. Participants submit and vote on short statements, and Polis uses statistical clustering to surface areas of consensus and division across the whole population.
A decision tool built around consent-based (sociocratic) decision-making, where a proposal moves forward unless someone raises a reasoned objection. It's oriented toward teams that want lightweight, objection-driven decisions rather than majority votes.
A collaborative funding and participatory-budgeting tool that lets a group allocate a shared pool of money across proposals. It complements a decision process by handling the 'how do we spend it' step transparently.
For adjacent needs: Kialo — A public and educational debate platform organized around pro/con argument trees — useful if your need is exploring both sides of a topic rather than reaching a group decision. (Argumentree vs Kialo). Thoughtexchange — A survey-style engagement platform for gathering and prioritizing input from very large audiences — a fit for wide, one-to-many consultation rather than deliberative group decisions. (Argumentree vs Thoughtexchange).
| Tool | Collaboration | Open-source | AI extraction | Consensus scoring |
|---|---|---|---|---|
| Argumentree | ||||
| Loomio | partial | |||
| Decidim | partial | |||
| Polis | ||||
| Murmur |
Comparison of widely-documented capabilities; vendors' feature sets change — verify current details with each tool.
You don't need an import tool. Paste the text of a Loomio thread or proposal into Argumentree and its AI extraction rebuilds it as a structured pro/con argument map — pulling the distinct claims out of the conversation, sorting the points for and against, and attaching counterarguments. A flat thread becomes a reusable decision record the group can rate and revisit. New to the approach? See collaborative decision-making, consensus decision-making, and pricing.
It depends on what you outgrew. If you need to capture and evaluate the reasoning behind a decision — not just tally a proposal vote — Argumentree maps decisions as structured pro/con argument trees, extracts arguments from transcripts with AI, and scores consensus. For open-source civic participation at scale, Decidim is a strong fit; for clustering opinions from very large groups, Polis; for consent-based team decisions, Murmur; and for participatory budgeting, CoBudget. The right choice follows your use case, not a single ranking.
Yes. Loomio itself is open-source, and several alternatives are too. Decidim is a mature open-source participatory-democracy platform used by governments and cooperatives; Polis is open-source and specializes in clustering opinions from large groups; CoBudget supports participatory budgeting. Argumentree is not open-source, but offers a free tier to start — its differentiator is structured argument mapping with AI extraction and consensus scoring rather than licensing model.
Both support asynchronous group decisions with a record. The difference is structure: Loomio captures the conversation and the vote (agree, disagree, abstain, block); Argumentree captures the argument — every claim mapped to the evidence and counterarguments for and against it, rated by the group into consensus scores. Argumentree also extracts arguments from meeting transcripts and documents with AI and translates across 66 languages.
You don't need an import tool. Paste the text of a Loomio thread or proposal into Argumentree and its AI extraction rebuilds it as a structured pro/con argument map — pulling out the distinct claims, the points for and against, and the counterarguments — so an existing discussion becomes a reusable decision record rather than a flat thread.
Argumentree turns discussions into structured decisions — AI extraction, consensus scoring, and a full audit trail. Free to start.
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