Solutions » Microsoft Cloud Migration Services » Slack to Teams Migration

Slack to Teams Migration

Migrate from Slack to Teams — Quickly, Securely, Seamlessly

Netwoven delivers the only enterprise Slack‑to‑Teams migration that combines full‑fidelity conversational continuity, Shared Channels–based information architecture, high‑velocity import pipelines, and deeply guided organizational transition — all operating entirely within your security perimeter.

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Vendor Comparison Guide

Trusted by Leading Brands

Cornerstone logo Cornerstone OnDemand
securonix logo Securonix
room 8 group logo Room 8 Group
tributetechnology logo Tribute Technology
conga logo Conga

★ ★ ★ ★ ★

“We engaged Netwoven as our strategic partner for our migration from Slack to Microsoft Teams, and the engagement was highly professional from start to finish… Read more ”

A

Anuj Saxena

Sr. Director – Infrastructure & Operations

Securonix

★ ★ ★ ★ ★

“Netwoven was adaptable to our needs, which allowed our migration from Slack to Teams to be delivered on time and within budget. We are very happy with the project results… Read more ”

M

Matt Powell

CTO

Tribute Technology

★ ★ ★ ★ ★

“Our experience with Netwoven was outstanding. After an unsuccessful test migration experience with a different vendor, we approached the selection of a new vendor… Read more”

L

Laura Lilley

COO

Room 8 Group

Why Slack to Teams Migrations Are Harder Than They Look

We uniquely migrate everything that matters — channels, messages, attachments, pinned items, app/bot posts, and now DMs and Group DMs directly into Teams Chat with full authorship fidelity and without the end‑user consent burdens common in other tools. Slack environments often include critical workflows, integrations, bots, and team‑owned automations. Netwoven brings deep expertise in re‑platforming Slack Workflows and custom applications into Power Platform and Microsoft 365, supported by structured advisory, office hours, code samples, and best‑practice patterns that empower Slack app owners while accelerating transition.

Challenges not adequately addressed by competitors

“It’s about more than just data.”

Slack is deeply embedded in business processes. Our methodology ensures your Workflow Builder automations and bot-driven approvals don’t just migrate—they evolve.

  • Workflow Re-platforming
  • Bot Content Migration
  • Authorship Preservation
  • ACM Change Management

Embedded Business Processes

  • Workflow Builder automations
  • Bot-driven approvals
  • Custom integrations
  • Channel-centric processes

Data Migration Complexities

  • Millions of messages/attachments
  • Multi‑workspace Enterprise
    Grid sprawl
  • Channel membership differences
  • App/bot content variability

Change Management Risk

  • Pushback from Slack Users
  • IA & Channel mapping complexity
  • Interruption to business
  • Skill mismatch for WFs &
    customizations

Technical Constraints

  • Migration velocity
  • User-level consent requirements
  • Authorship metadata loss
  • Security perimeter risks

The Verdict: Inability to address the above challenges are the primary reasons Slack to Teams migration struggle.

See How We Solve This

Slack to Teams Migration: Tool Comparison

Comprehensive comparison between native Microsoft tools, 3rd-party products, and Netwoven’s full-fidelity consulting services.

See Full Comparison
0/4: Not Supported
1/4: Poor
2/4: Moderate
3/4: Better
4/4: Best

* Analysis based on market capability benchmarking as of March 2026.

Migration Features Microsoft Native Prominent 3rd-Party ISV Tools * Netwoven Comparison Summary
Service Model
  • Native Microsoft Migration Manager tool.
  • Migration tools with included managed migration delivery. Migration engineers assist to plan, configure and execute migrations alongside customer, end-to-end.
  • End-to-end, white-glove migration service including strategy, execution, adoption & change management and Hypercare.
DM & GM Migration
0/4
  • No support for Slack direct or group message migration.
1/4
  • Supported with limitations; slow, requires user consent, loses timestamps.
4/4
  • High-velocity DM & GM migration, no user consent required and full fidelity.
Channel Migration
3/4
  • Supports migration to all Channel types, but only into new Channels created by the migration tool.
2/4
  • Full support for migration to Standard Channels in newly created Teams; author and timestamp are preserved in that scenario only. 1, 2
  • Cannot migrate into Private or Shared Channels of a newly created Team while in Migration mode. Private and Shared Channels can only be written to once the Team is taken out of Migration mode. Author and timestamp are not written to the author/timestamp fields in Teams. 1, 2
  • Migrating into existing channels puts old messages as the most recent in the channel. 1, 2
  • Supports all Slack licensing levels. 1, 2
4/4
  • Supports all channel types (Standard, Private, Shared) in new and existing Teams and new and existing Channels.
Migration Fidelity
2/4
  • Limited message migration fidelity, no pinned messages support
2/4
  • Good for new Standard Channels, authorship and timestamp loss for all other Channels. 2
4/4
  • Full preservation of authorship, timestamps, and message threading to all Channel types.
Migration Velocity
3/4
  • ~15M messages per week.
2/4
  • Significantly slower than other options. Up to 100X difference in speed depending on the target. 1, 2
4/4
  • Enterprise-grade velocity supporting 10M–30M+ messages per week.
Slack Enterprise Grid Support
2/4
  • Supports Enterprise Grid but limited to one workspace connection at a time.
2/4
  • Limited multi-workspace support.
4/4
  • Full multi-workspace and Enterprise Grid support.

Notes:
* Aggregate results based on Netwoven’s independent testing of two prominent 3rd-party ISV Slack-to-Teams migration tools in March 2026. Results shown reflect common/composite behavior observed across both tools.
1 Based on written responses from Vendor support teams during our testing in March 2026.
2 Based on the results of our testing in March 2026.
3 Based on the Vendors’ own published materials in March 2026.

Why Organizations Are Migrating from Slack to Microsoft Teams

Eliminate Redundant Costs

Stop paying for Slack when you already own Microsoft 365. Consolidate licenses and simplify your tech stack.

Centralize Security & Compliance

Strengthen your posture with Microsoft Purview and secure your IP within your tenant boundaries.

Consolidation at Scale

  • Reduce fragmentation in communication & collaboration tools & administration
  • Avoid the hassle of cost increases, duplicate costs and onerous Salesforce contract renewals
  • Improve integration with Copilot, Power Platform, Purview, and M365 apps

Moving to Microsoft Teams provides a unified platform for calling, meeting, chatting, and collaborating with the full power of the Office 365 ecosystem.

The Netwoven Advantage

Combining 7+ years of specialized experience with proprietary accelerators to deliver a risk-free Slack to Teams migration.

Unparalleled Migration Fidelity

High-fidelity preservation of DMs, GMs, and complex channel formatting without user consent hurdles.

DMs & GMs → Teams Chat with full authorship fidelity and no individual user consent
Channels → Any Channel type, preference to Teams Shared Channels (modern architecture + future-proofing)
Slack markup conversion with fidelity for formatting, mentions, links, pinned messages
User, app, and bot messages migrated accurately

Unparalleled Migration Velocity

Industry-leading throughput moving tens of millions of messages per week.

Industry-leading throughput: 2x–40x faster than competitive tools
Proven ability to move tens of millions of messages per week
High-scale parallelism running inside customer Azure environment

Unparalleled Security

100% tenant-bounded migration. Your data never leaves your security perimeter.

All identities, compute, and storage inside your Azure subscription and M365 tenant
No data exfiltration, no vendor-hosted migration pipelines
Encryption in-flight and at-rest
Guidance for configuring M365 security controls around migrated content

IA & Mapping Excellence

Algorithmic channel grouping and Shared Channels architecture for a ‘Slack-like’ experience.

Shared Channels as the ‘Slack-like but better’ destination pattern
Statistical analysis + algorithms to group Slack channels into optimal Teams structures
Streamlined mapping interfaces for content owners & PMO teams

Workflow & App Re-platforming

Seamlessly transition Slack Workflow Builder and custom bots to Power Automate.

Slack Workflow Builder → Power Automate
Slack apps, bots, and integrations → Power Automate & Teams customizations
Advisory + code samples + office hours for channel owners

ACM Leadership

Proven strategies and AI tools to overcome user pushback and ensure adoption.

Migration Help Center template
AI Help Agent for self-service support
Training, UAT facilitation, communication kits, best-practice assets
Proven strategy for overcoming Slack-user pushback

Assessment & Analysis Excellence

Deep Power BI insights to guide migration, rebuild, or archive decisions.

Power BI insights on channels, messages, users, apps, workflows
“Challenger methodology” to guide what should be migrated, rebuilt, archived, or retired

Unparalleled Value & ROI

Global delivery and 7+ years of specialized experience for maximum efficiency.

Global delivery for cost efficiency + 24×7 execution
Proprietary accelerators & AI tooling
Longest track record in the industry — 7+ years of Slack migrations

Click any advantage above to explore our detailed technical approach

Slack to Teams Migration Methodology

01

Assessment & Inventory

Comprehensive analysis of Workspace, Channels, and ROT data.

02

Strategy & Framework

Defining the Shared Channels target model and re-platforming roadmap.

03

Power Platform COE

Establishing governance and DLP baselines for your new automations.

04

IA & Mapping

Finalizing channel membership modeling and permission alignment.

05

Velocity Execution

Containerized job orchestration for author-preserving message migration.

06

Workflow & App Support

Re-platforming Slack Workflow Builder to Power Automate.

07

Validation & UAT

UAT facilitation with validation dashboards and readiness checklists.

08

Cutover & Hypercare

Delta migrations, Go-live coordination, and AI Help Agent activation.

Success Stories

Hear how we’ve helped Fortune 500 companies transition to Microsoft 365 without missing a beat.

“We engaged Netwoven as our strategic partner for our migration from Slack to Microsoft Teams, and the engagement was highly professional from start to finish…read more”

S
Sr. Director – Infrastructure & Operations

Securonix

View Case Study →

“Netwoven was adaptable to our needs, which allowed our migration from Slack to Teams to be delivered on time and within budget. We are very happy with the project results.”

C
Chief Technology Officer

Tribute Technology

View Case Study →

“The partnership forged by Conga and Netwoven has resulted in substantial and long-lasting benefits to the entire organization, providing enhanced collaboration, simplified management, and reduced cost by standardizing on the Microsoft 365 suite of tools.”

C
Chief Information Officer

Conga

View Case Study →

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