Flock vs Slack

Flock

• Small and mid-sized teams that want chat, calls and to-dos in one app
• Teams that want polls, notes and reminders built into their chat
• Nonprofits, which can ask for special pricing

Slack

• Teams that want conversations organized by channel rather than email threads
• Companies that work with outside partners in shared channels
• Organizations that already run on Salesforce
• Teams that connect many third-party apps to their chat

Flock

• Starter is meant for teams of 1 to 20 members, searches only 10,000 messages and has 10 public channels.
• Group video calls are capped at 20 participants and, like screen sharing, need Pro or Enterprise.
• Guests are free for 90 days from the invitation, then billed at the same rate as team members.
• Single sign-on and Active Directory sync are listed under Enterprise, which is priced by quote.

Slack

• The Free plan keeps only 90 days of message history searchable, allows 10 apps, and limits huddles and Slack Connect to 1:1.
• SAML single sign-on and SCIM start at Business+; ongoing Slackbot access is on Business+ and Enterprise+, with a limited trial on Free and Pro.
• Enterprise search, multiple SAML configurations and native data loss prevention are limited to Enterprise+, which is priced by sales.
• In a browser, huddles are supported only in Chrome and Firefox.

Flock

Channels and direct messages

Public channels open to the whole company, private invite-only channels, and 1-1 and group messages, with an All Channel feed that gathers new messages in one place.

Video and voice calls

1-1 video calls are on the free plan. Pro and Enterprise add group video calls with up to 20 participants and screen sharing. Voice notes can be sent in any channel.

To-dos, notes, polls and reminders

Discussions can be turned into shared to-dos with due dates, alongside team notes organized by channel, anonymous polls and reminders.

File sharing

Files are shared in chats and channels. Storage is 5 GB for the whole team on Starter, 10 GB per member on Pro and 20 GB per member on Enterprise.

App store and API

The app store lists integrations such as Google Drive, Asana, Trello, Jira, GitHub and Zoom, with webhooks and developer documentation for building custom apps.

Admin and security controls

Paid plans allow multiple team admins and multiple approved sign-up domains. Single sign-on and Active Directory sync are listed under Enterprise.

Slack

Channels and direct messages

Conversations are organized into channels for each project, topic or team, alongside direct messages. Paid plans keep the full message and file history searchable; Free keeps 90 days.

Huddles and clips

Huddles are audio and video meetings with screen sharing, 1:1 on Free and for groups on paid plans. Clips are recorded audio or screen updates shared in a conversation.

Slack Connect

Message people outside the company. Free allows 1:1 external direct messages; paid plans add group chats and shared channels with up to 250 organizations.

Canvases and lists

A canvas holds text, files, images and video inside Slack, and lists are used to manage projects and organize tasks with teammates.

Workflow Builder and apps

Workflow Builder automates routine processes without code, and the app directory lists more than 2,600 apps. A Free workspace can connect up to 10 of them.

AI in Slack

Pro includes AI conversation summaries. Business+ adds AI search, daily recaps, file summaries, workflow generation and the Slackbot personal agent, subject to plan limits.

Flock

• Starter$0

  For teams of 1-20 members. Unlimited 1-1 and group messages, 10,000 searchable messages, 10 public channels, 5 GB in total and 1-1 video calls.

• PRO$4.50

  per user / month, billed annually ($6 billed monthly)

  Aimed at teams of 20-100. Unlimited searchable messages and channels, 10 GB per member, group video calls with up to 20 participants and screen sharing.

• EnterpriseCustom

  For organizations with 100+ members. 20 GB per member, single sign-on, Active Directory sync, custom onboarding and dedicated support.

Slack

• Free$0

  90 days of message history, up to 10 app integrations, and 1:1 huddles and external messages.

• Pro$7.25

  per user / month, billed annually ($8.75 billed monthly)

  Unlimited message history and app integrations, group huddles, Slack Connect channels with up to 250 organizations, and AI conversation summaries.

• Business+$15

  per user / month, billed annually ($18 billed monthly)

  Adds AI search, daily recaps, file summaries and workflow generation, the Slackbot agent, SAML single sign-on and SCIM user management.

• Enterprise+Custom

  Adds enterprise search across connected apps, multiple SAML configurations, EMM support, native data loss prevention and unlimited workspaces.

Flock

• Annual discount

  25% less with annual billing

  Flock PRO costs $4.50 per user / month billed annually against $6 per user billed monthly.

• Nonprofit

  Special pricing for nonprofits

  Flock's pricing FAQ says nonprofit organizations get special pricing based on geography and area of work, quoted through a live chat with its team.

Slack

• Annual discount

  About 17% less with annual billing

  Pro is $7.25 per user / month paid annually against $8.75 paid monthly, and Business+ is $15 against $18. Salesforce's Slack pricing page puts the saving at approximately 16%.

• Other savings

  50% off the first 3 months for new teams

  A limited-time offer for teams that buy Pro or Business+ online within 7 days of creating the workspace. It applies to monthly billing only, and standard pricing follows after 3 months.

• Nonprofit

  Free or 85% off for eligible nonprofits

  Eligible nonprofits get a free Pro upgrade for workspaces with 250 or fewer members and 85% off above that size. Business+ is 85% off at any size.

• Education

  85% off for educational institutions

  The Slack for Education program gives approved institutions an 85% discount on the Pro or Business+ plan, applied at checkout.