How can I reliably match Open Mart/Google Maps companies with HubSpot records when domains and company names frequently change for SMB clients?

Since HubSpot only does exact matching (unlike Salesforce's 'contains' function), try using address or phone number as your primary matching keys instead of domain/company name - this works much better for SMBs and chains. For more advanced matching, consider building an Apify actor that pulls HubSpot data via API and runs fuzzy matching using multiple signals like domain normalization, company name similarity scoring, phone number normalization, and address geocoding with confidence scores. You can also export HubSpot records to Clay for formatting and then re-import via Clay's HubSpot integration.