CSV import

Contacts → Import → Upload CSV.

1. Drop your CSV file
2. Map your columns to Groundbase fields (first name, last name, email, phone, company, etc.)
3. Pick how to handle existing matches (email is the dedup key) — skip, update, or always create new
4. Optionally tag every imported row with a single tag (e.g. "Imported 2026-06-08")
5. Click Import

Big imports (1000+ rows) process in chunks — you'll see progress as it goes. We do multi-row INSERT batching server-side so 100 contacts now imports in well under a second; the slow per-row loop of the early days is gone.

What we accept

• CSV or TSV
• Any header names — you map them yourself, so column order doesn't matter
• Phone numbers in any format — we normalize to E.164 (+1...)
• One address per row in the import (multiple addresses per contact can be added in the UI after import)

Re-importing

Update an existing contact by re-importing a CSV with the same email — pick "Update existing" on the dedup step. Empty cells DON'T overwrite existing data; only filled cells replace.