Muster review
A focused advocacy CRM and campaign platform for organizations mobilizing supporters.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Muster is a web-based grassroots advocacy platform for nonprofits, associations, chambers of commerce, agencies, and corporations. It combines advocacy campaign creation, embeddable action forms, petitions, legislator targeting, analytics, email broadcasts, SMS alerts, and an advocate CRM. Local, state, federal, and custom targeting support organizations working across different advocacy scopes, while district matching and segmentation help organize supporter data around outreach goals.
Pricing is clearest for the Advocacy CRM plan, listed at $99 per month with monthly billing. It includes district matching, contact segmentation, sign-up form building, advocate mapping and visualization, custom field management, and Grasstops logging. The published plan details show that the price scales with contacts stored. Other options include Full Muster Platform, Advocacy Only, and CRM + Advocacy, but most platform plans require contacting Muster for pricing. There is no free plan, so teams should assess contact volume and required campaign capabilities before selecting a tier.
Muster’s strongest fit is for organizations that want advocacy operations and supporter management in one system. Its ecosystem includes Salesforce, Zapier, Mailchimp, Virtuous, Bloomerang, Constant Contact, and Slack, with CRM, donor-management, email-marketing, and workflow connections available through those integrations. The platform’s breadth covers petitions, action centers, forms, calls, email, SMS, targeting, and reporting, while the CRM + Advocacy option adds advocate storage, acquisition forms, segmentation, and Zapier integration. Teams seeking a focused advocacy CRM with campaign tools should consider Muster; organizations prioritizing a free entry tier, transparent pricing across all plans, or a non-web platform should look elsewhere.
Muster pros and cons
- Where it wins
- District matching, segmentation, and advocate mapping support targeted outreach.
- Petitions, action forms, and legislator targeting cover core advocacy campaigns.
- Email, SMS, analytics, Salesforce, and Zapier support broader workflows.
- Where it doesn't
- The $99-per-month starting price may limit access for smaller teams.
- Most platform plans require contacting Muster for pricing.
- The platform is web-based rather than offered across multiple platforms.
Muster fact sheet, pricing and score →
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