---
title: Platform Selection (Slack, Discord, Circle, Forum) — RGM Training
url: https://realgrowthmatters.com/training/community-led-growth/platform-selection-slackdiscordcircleforum/
updated: 2026-06-10
source_html: https://realgrowthmatters.com/training/community-led-growth/platform-selection-slackdiscordcircleforum/
---

[Home](../../../index.html) › [Training](../../index.html) › [Community-Led Growth](../index.html) › Platform Selection (Slack, Discord, Circle, Forum)

RGM° · Training

# Platform Selection (Slack, Discord, Circle, Forum)

Shapes everything. Options, selection criteria, migration, integration, cost, hybrid platforms.

### What you will learn

1. [Why platform choice matters](#why)
2. [Platform options](#options)
3. [Selection criteria](#selection)
4. [Migration considerations](#migration)
5. [Integration with stack](#integration)
6. [Cost considerations](#cost)
7. [Hybrid platforms](#hybrid)
8. [Advanced playbook](#advanced)
9. [Common mistakes](#mistakes)
10. [Checklist](#checklist)

## Why platform matters

The community platform shapes interaction modes, discoverability, member retention, and growth dynamics. Wrong platform = right community can't grow. Mature programs choose deliberately.

## Options

| Platform | Best for |
| --- | --- |
| Slack | Real-time chat; small to mid communities; B2B SaaS |
| Discord | Gaming, creators, developer communities |
| Discourse | Forum; long-form threads; searchable knowledge |
| Vanilla Forums | Forum; enterprise |
| Mighty Networks | Community + events + content |
| Circle | Modern community + courses |
| Bevy | Community + events focus |
| Hivebrite | Alumni / enterprise community |
| Custom build | Scale and unique requirements |

## Selection

- Member interaction mode (real-time vs async).
- Discoverability (search, indexing).
- Scale (members count).
- Integration needs (CRM, product).
- Cost.
- Mobile experience.
- Event capabilities.
- Knowledge base capabilities.
- Moderation tools.

## Migration

- Member data export / import.
- Content preservation.
- Re-engagement post-migration.
- Communication plan.
- Phased rollout.
- Risk of member loss.
- Old platform sunset.

## Integration

- CRM integration (member data flow).
- SSO / customer identity.
- Product integration (in-product community access).
- Email automation.
- Analytics integration.
- Webhook capabilities.

## Cost

- Per-member or flat-fee models.
- Platform cost.
- Community manager salary.
- Tooling and integration costs.
- Event production costs.
- Annual investment vs community value.

## Hybrid

- Slack for real-time + Discourse for knowledge base.
- Discord for chat + Notion for knowledge.
- Community platform + LinkedIn group.
- Cross-platform challenges (member fragmentation).
- Single source of truth strategy.

## Advanced playbook

- Platform selection rubric with weighted criteria.
- Pilot before commitment.
- Migration plan if changing platforms.
- Integration with broader tech stack.
- Annual platform evaluation.
- Member experience research.
- Cost-per-active-member tracking.
- Cross-platform unification strategy.
- Community on existing product (in-product community).
- Annual platform ROI review.

## Common mistakes

- Platform chosen by inertia (already using Slack).
- Real-time platform for async needs (or vice versa).
- Discoverability ignored.
- Integration with CRM missing.
- Cost-per-member not tracked.
- Migration planning insufficient.
- Hybrid platforms fragmenting members.
- Mobile experience poor.
- Event capabilities mismatched.
- Annual evaluation skipped.

## Operating checklist

- Platform selection rubric
- Pilot before commitment
- Integration with CRM
- Mobile experience verified
- Event capabilities matched to needs
- Cost-per-active-member tracked
- Migration plan if applicable
- Cross-platform unification
- Annual platform evaluation
- Member experience research

## Sources and further reading

- Bevy, Mighty Networks, Circle, Discourse documentation
- Slack, Discord community management
- David Spinks platform research
- CMX Hub platform comparisons
- Sangram Vajre B2B community platforms
- Reforge community platforms
- RGM Community-Led Growth series
- Holly Firestone community building
- Hivebrite enterprise community
- Marketing Brew community coverage
- OpenView community-led growth research
- Industry community platform comparison

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Part of the [Community-Led Growth](../index.html) series.