Slack

Where work happens — team messaging for modern businesses

communicationFree planSetup: simple

8.8

AppAdvize Score

Short answer

Slack scores 8.8/10 in our review and is best for agencies managing client communication and remote teams needing real-time collaboration. The standout: Universal adoption — clients and contractors likely already have it. Watch out: Free plan caps message history at 90 days. There's a free plan to start with.

Affiliate disclosure: Some links on this page are affiliate links. If you sign up through them, AppAdvize may earn a commission — at no extra cost to you. Commissions never influence our scores or recommendations; see how we test and score.

Reviewed by the AppAdvize editorial team · last verified March 2026

Overview

Slack is the dominant team messaging platform for agencies, remote teams, and growing businesses. Channels keep conversations organized by project or topic; direct messages handle 1:1 and small-group communication. The free plan covers core messaging but limits message history to 90 days. Paid plans unlock full search history, group video calls, and advanced security controls.

Pricing

✓Free plan available

Free — Free — 90-day message history, 1:1 audio/video

Enterprise plans available on request

See full pricing on Slack →

Pros & Cons

What we like

✓Universal adoption — clients and contractors likely already have it
✓Massive integration ecosystem (2,600+ apps)
✓Channels scale from 2-person teams to global orgs
✓Excellent mobile apps
✓Slack Connect for cross-company collaboration

Watch out for

✕Free plan caps message history at 90 days
✕Can become noisy and distracting without discipline
✕Paid plan pricing adds up quickly per seat

Best for

Agencies managing client communication
Remote teams needing real-time collaboration

Not ideal for

Solo freelancers without teams
Async-first teams (email + Loom may suffice)

Alternatives

Loom

communication

9/10

Zoom

communication

8.5/10

Notion

storage docs

8.8/10

See all Slack alternatives, compared →

Slack FAQ

Is Slack worth it?

Slack scores 8.8/10 in our review and is a strong fit for agencies managing client communication. Standout: Universal adoption — clients and contractors likely already have it. Main trade-off: Free plan caps message history at 90 days.

Is Slack free?

Slack is free to use — Free — 90-day message history, 1:1 audio/video.

What are the best Slack alternatives?

Top Slack alternatives are Loom, Zoom, Notion. See our full comparison at /tools/slack/alternatives.

Not sure which tool?

Get a personalized communication recommendation

Six questions and we'll match you to the tools that actually fit your business, budget, and team size.

Start the quiz →

AppAdvize Scores

Ease of Use9/10

Value for Money8/10

Support Quality8/10

Integrations9.5/10

Scalability9.5/10

Overall8.8/10

Quick Facts

Founded: 2013
Users: 38M+ daily active users
Setup time: ~20 min
Complexity: simple
Maturity: established

Last verified: 2026-03-01