Certified Attio Experts

Migrate to Attio.

We move revenue teams from their legacy CRM onto Attio. Pick the tool you're leaving below to see what carries over cleanly, what gets rebuilt, what we can't bring with us, and how long it usually takes.

Source CRM

Pick your data source

The shared playbook

How we run every migration

Every source CRM has its own mapping and gotchas. The mechanics underneath are the same: a kickoff that decides the data model, imports keyed on the source CRM's record IDs so completeness is deterministic, a short blackout window for cutover, deduplication and merge after the final import is verified complete.

  1. 01

    Kickoff + attribute review

    Working session to agree on the data model and confirm scope. The engineering team walks every attribute in the source workspace and decides what stays, what gets renamed, what gets retired. This is the engineering work that opens the project, not a separate deliverable.

  2. 02

    Schema build + static import

    Configure the Attio workspace around the agreed schema. Run the first import dry run keyed on the source CRM's legacy IDs so completeness checks are deterministic across multiple passes.

  3. 03

    Configuration, training, feedback

    We configure lists, views, and day-one integrations, then the team connects inboxes so interaction history can backfill. We set the inbox auto-create policy before connection so new records are created intentionally.

  4. 04

    Cutover

    Short blackout window. Final export from the source CRM. Upsert delta against legacy IDs. Validation across record counts, per-field population, and value-level spot comparison.

  5. 05

    Deduplication + merge

    Run the deduplication pass through Attio's Duplicate Detection app, team review, bulk merge through tooling. Legacy IDs removed after merge.

  6. 06

    Phase two (optional)

    Deeper integrations, advanced reporting, API rewrites for non-critical scripts. Most teams run Attio for a few weeks before scoping this.

Why it works

Three principles behind the process

The mechanics stay consistent across source CRMs. These principles keep cutover short without weakening verification.

Upsert on legacy record IDs

We key imports on the source CRM's record IDs, not on email or domain. That lets us run multiple passes without creating duplicates and makes completeness checks deterministic rather than statistical. A basic CSV import cannot provide that level of control.

Merge at the end

Merging records removes the legacy IDs we use to verify completeness. If we merge early, we lose our upsert keys, so we import everything, confirm coverage, and then run deduplication and merge once.

Honest defaults

No fabricated SLAs, no invented pricing. Timeline ranges come from our actual track record. Cost is scoped per workspace once we understand the data.

Migration FAQ

Which CRMs do you migrate from?
How long does a typical migration take?
Can you handle a migration on a tight renewal deadline?
What happens to email and meeting history?
Do you handle the integrations as part of the migration?
How is this different from doing the migration ourselves?

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