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AI ASSISTANTS · MIGRATION GUIDE

Switching from Microsoft 365 Copilot to ChatGPT

Most teams do not leave Microsoft 365 to use ChatGPT: they keep Copilot Chat, drop paid Copilot licences where they are not used, and add ChatGPT Business seats. Agents are rebuilt as custom GPTs.

Jump to migration steps Read the full comparison
By Bill Belcamino · Last updated September 19, 2026 · Our methodologyResearched and fact-checked by the HelpCompare team
Switching from Microsoft 365 Copilot to ChatGPTVerified Sep 19, 2026

Heads up: AI assistants change their plans, prices, models and usage limits almost daily. Everything on this page is accurate as of September 19, 2026, the date we checked each vendor’s pricing page and documentation. Confirm current terms on the vendor’s own site before you buy.

Quick verdict: Keep Microsoft 365 and its free Copilot Chat, and review who actually uses paid Copilot licences before renewal. Give ChatGPT Business seats ($20 a month each on annual billing) to people who need image generation, custom GPTs or Codex, and connect ChatGPT to Microsoft 365 so it can reach SharePoint and OneDrive files. Have an admin export Copilot history with Purview eDiscovery if you need an archive; users cannot export their own.

Estimate · your inputs

Switching Cost & Friction Estimator

Most buyers only budget for the new subscription. This estimates the hidden labor, data-cleanup, and retraining cost of actually making the switch.

25,000
10

Estimate assumes: 1 hour of data-mapping/cleaning labor per 2,000 records, a blended $75/hr ops rate, tiered migration & cleaning tooling fees, and 4 hours of retraining per seat at a $45/hr fully-loaded rate.

Estimated Migration Time —
Data Friction Rating —
Total Hidden Switching Cost $0

    Why teams move from Microsoft 365 Copilot to ChatGPT

    Tools beyond Office

    ChatGPT adds image generation, voice, deep research, custom GPTs and Codex.

    Works across suites

    ChatGPT connects to Microsoft 365, Google Workspace, Slack and GitHub.

    No base licence needed

    ChatGPT Business is a standalone seat; it does not require a Microsoft 365 plan.

    How the migration actually works

    Check Copilot usage reports before renewal: licences nobody uses are the first saving.

    StepWhat you do
    1Have an admin export Copilot historyCopilot interactions are stored in each user’s Exchange mailbox. Admins export them with Microsoft Purview eDiscovery (as PST or individual messages); Microsoft documents no self-service export for users.
    2Review Copilot licence usageUse Copilot’s adoption and usage analytics to find licences that are not used.
    3Set up ChatGPT BusinessBuy at least 2 seats (up to 200) and configure SAML single sign-on with your identity provider.
    4Connect Microsoft 365Enable ChatGPT’s Microsoft 365 connector so it can work with your SharePoint and OneDrive files.
    5Rebuild Copilot agents as custom GPTsRecreate each Copilot Studio agent’s instructions and knowledge as a custom GPT shared with the workspace.
    6Reduce Copilot licences at renewalCopilot Business is billed annually or monthly; the enterprise add-on requires an annual commitment.

    What this path doesn’t do for you:

    Nothing imports: OpenAI documents no import of chats or memories from other assistants. ChatGPT does not work inside Word, Excel or Outlook, and ChatGPT Business chats are not stored in Exchange, so Purview retention and eDiscovery no longer cover them. Custom retention is an Enterprise feature on ChatGPT.

    Pricing side by side

    PlanMicrosoft 365 CopilotChatGPT
    Free planCopilot Chat with eligible Microsoft 365Yes — individuals
    Team planCopilot Business add-on $21/user/mo annual ($25.20 monthly)Business Standard seat — $20/mo annual, $25 monthly
    Heavier useBundles: Business Standard with Copilot $23.50, Premium with Copilot $32Premium seat — $100/mo annual, $125 monthly
    Team sizeUp to 300 users (Business)2–200 seats
    EnterpriseMicrosoft 365 Copilot add-on $30/user/mo paid yearlyCustom pricing
    SSO / SCIMMicrosoft Entra ID sign-in; SCIM not statedSSO on Business; SCIM on Enterprise

    Prices checked on chatgpt.com/pricing and Microsoft’s Copilot business pricing page on September 19, 2026 (US). The Copilot add-on also needs a Microsoft 365 plan. AI plans change often; confirm current rates before you buy.

    Feature parity check

    CapabilityMicrosoft 365 CopilotChatGPT
    Import from the other toolNone documentedNone documented
    Reusable assistantsAgents built with Copilot StudioCustom GPTs and workspace agents
    Works inside Office appsYesNo — connects to Microsoft 365
    Coding agentNone listedCodex
    Chat exportAdmins, via Purview eDiscoveryThrough the workspace owner

    Going the other direction, or want the full comparison first?

    Read the ChatGPT vs Microsoft 365 Copilot comparison Switching from ChatGPT to Microsoft 365 Copilot instead?
    Verified data

    Security & access: what changes when you switch

    Security, offline and access rules that differ between Microsoft 365 Copilot and ChatGPT. Rows where both tools are the same (4) are left out; the full side-by-side is on each tool’s page: Microsoft 365 Copilot, ChatGPT.

    What changesMicrosoft 365 Copilot (today)ChatGPT (after)
    SOC 2 reportNot publishedSOC 2 Type IIsource
    Other certificationsISO/IEC 42001sourceISO/IEC 27017, ISO/IEC 27018, ISO/IEC 27701, ISO/IEC 42001, SOC 3, PCI DSS v4.0.1, CSA STAR, FedRAMP 20x, TX-RAMPsource
    HIPAA (BAA)BAA availablesourceBAA availableEnterprisesource
    Single sign-on (SAML/OIDC)YesAny eligible Microsoft 365 plan (sign-in via Microsoft Entra ID)sourceYesBusinesssource
    SCIM user provisioningNot publishedYesEnterprisesource
    Two-factor authenticationYesEnforcement: All Microsoft 365 plans via Entra ID security defaults; Conditional Access policies need Entra ID P1 (included in Business Premium)sourceYessource
    Admin audit logYesCopilot Chat (included)sourceYesEnterprisesource
    Data residency choicesNot publishedUS, EU, UK, Japan, Canada, South Korea, Singapore, India, Australia, UAEEnterprisesource
    EncryptionBitLocker and per-file encryption at rest; TLS and IPsec in transitsourceAES-256 at rest; TLS 1.2+ in transitsource
    IP allowlistingYesMicrosoft 365 Business Premium (Entra ID P1 Conditional Access)sourceYesEnterprisesource
    Device & session controlsNot publishedYesEnterpriseEnterprise: Intune for iOS (pricing table) and Workspace Blocking via a ChatGPT-Allowed-Workspace-Id HTTP header on the corporate network; not ticked for Business.source
    Office & room hardwareCopilot in Teams Phone works on VoIP and PSTN calls; no Copilot-specific room hardware is documented.source—
    Editorial assessment

    Before you cut over

    • Set up single sign-on in ChatGPT on Business before you invite the team, so accounts are created through your identity provider rather than by hand.

    Checked September 19, 2026 against each vendor’s own trust center, help docs and app pages. Hover or tap “source” to see the exact wording we relied on. “Not published” means we could not find the vendor saying it on its own site — it doesn’t mean the feature is missing. Plan names are the lowest plan the vendor says includes the feature. Security · Offline · Remote vs office · Download the data

    Frequently Asked Questions

    Do I have to drop Microsoft 365 to use ChatGPT?

    No. ChatGPT Business is a standalone seat that connects to Microsoft 365. Copilot Chat stays free with your Microsoft 365 work subscription.

    Can users export their Copilot chats?

    Microsoft documents no self-service export. Admins can export Copilot interactions with Microsoft Purview eDiscovery.

    Can ChatGPT import Copilot agents?

    No. Rebuild each agent’s instructions and knowledge as a custom GPT.

    Will compliance tools still cover AI chats?

    Not in the same way. Copilot chats sit in Exchange under Purview; ChatGPT Business chats do not, and ChatGPT lists custom retention under Enterprise.

    Will my old chats be searchable in the new assistant?

    No official path moves chat history between these assistants for business accounts. Keep your export as an archive, and move the knowledge that matters (instructions, reference files, prompts) into the new tool’s projects or custom assistants.

    Canonical data for the tools on this page

    Every pricing fact, rating, AI billing model and switching guide we hold on each tool, on one page — with the date each figure was last verified.

    ChatGPTPricing, free plan, AI cost & every comparison›Microsoft 365 CopilotPricing, free plan, AI cost & every comparison›
    ChatGPT vs Microsoft 365 CopilotHead-to-head comparisonChatGPT vs ClaudeHead-to-head comparisonChatGPT vs GeminiHead-to-head comparison

    Sources

    Prices on this page were recorded from each vendor’s own pricing page on the date shown at the top of the page. Vendors change pricing often — check the live source before you buy.

    Every figure is also in our open dataset (JSON and CSV, CC BY 4.0), with its source page and verification date. See how we research pricing.

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    From shortlist to switched

    Built for the leader who owns the selection, answers for the spend, drives the rollout, and lives with the results. HelpCompare covers the whole decision, not just the first step.

    01 · CompareWhich tool fits your team, side by side.75 comparisons 02 · Price & approveSourced, dated pricing and a one-page brief for sign-off.Decision brief 03 · SwitchWhat moves, what you rebuild, what it costs.150 guides 04 · ShareDownload and cite the data. CC BY 4.0.Open data
    Bill Belcamino, founder of HelpCompare
    About the author

    Bill Belcamino

    Founder and author, HelpCompare

    Bill has worked in software and digital marketing for more than 20 years. He spent nine years as an engineer at HP, served as COO scaling a platform past 200,000 users, and ran Google’s $70M/year search syndication partnership at Alot.com. He has bought, trialled, integrated and cancelled more SaaS tools than he can count, and started HelpCompare because the real cost of switching tools is the part nobody covers.

    “I’ve sat on both sides of the table: the agency recommending the tool and the client paying for it.”

    Researched and fact-checked by the HelpCompare team. Pricing on this page was last verified on September 19, 2026. No paid sponsorships, no affiliate commissions.

    Read Bill’s story How we verify pricingSpot an error? Tell Bill