Go beyond basic contact info. With SMASHSEND Custom Fields, track any data that matters to your business—from shoe sizes to subscription tiers, purchase history to preferences.
✓ Unlimited custom fields ✓ All data types supported ✓ API access included
While others limit you to basic fields, SMASHSEND gives you the power to store any data type, create complex properties, and use them everywhere.
Store names, descriptions, IDs, scores, prices, quantities, or any text and numeric data. Perfect for basic customer information and metrics.
Track multiple values like product interests, tags, categories, or preferences. Use single-select or multi-select options for structured data.
Capture timestamps, anniversaries, expiration dates, or yes/no flags. Perfect for time-based automations and conditional logic.
Store complex nested data structures for advanced use cases. Perfect for developers who need maximum flexibility.
Store sensitive data securely with field-level encryption. Perfect for PII, tokens, or any confidential information.
Create dynamic fields that calculate values based on other properties. Update automatically as source data changes.
Your custom fields aren't locked away—use them across the entire SMASHSEND platform for truly personalized experiences.
Personalize every email with custom field tokens. Display customer-specific data, recommendations, or dynamic content based on any property.
Hi {{first_name}}, Based on your preference for {{favorite_category}}, we thought you'd love our new collection! Your loyalty points: {{loyalty_points}} Member since: {{member_since}}
Build powerful segments using any custom field. Combine multiple conditions with AND/OR logic to target exactly the right audience.
Trigger workflows based on custom field changes. Update fields automatically, create conditional branches, or sync with external systems.
Full API access to read and write custom fields. Receive webhooks when fields change. Keep your entire stack in sync.
See how businesses use SMASHSEND Custom Fields to create powerful, data-driven email experiences.
Track purchase history, browsing behavior, size preferences, and wish list items. Send targeted product recommendations that convert 3x better.
Monitor feature adoption, usage metrics, and subscription details. Trigger onboarding emails based on user behavior and progress.
Track course progress, quiz scores, and learning preferences. Send personalized content recommendations and achievement celebrations.
Store appointment history, preferences, and consent data securely. Send HIPAA-compliant reminders and personalized health tips.
Track property preferences, budget ranges, and viewing history. Match leads with perfect properties automatically.
Store player stats, achievements, and preferences. Send personalized game updates, rewards, and recommendations.
Most email platforms limit you to basic fields. See why developers and marketers choose SMASHSEND for true flexibility.
Built by developers, for developers. Integrate custom fields with your application in minutes, not days.
// Create a custom field const field = await smashsend.customFields.create({ name: 'subscription_tier', type: 'select', options: ['free', 'pro', 'enterprise'], defaultValue: 'free' }); // Update contact with custom field await smashsend.contacts.update('ctc_abc123', { email: 'user@example.com', properties: { subscription_tier: 'pro', last_login: new Date(), feature_flags: ['dark_mode', 'beta_access'], usage_stats: { api_calls: 1523, storage_gb: 12.5 } } });
Custom fields work seamlessly with every SMASHSEND feature. One platform, infinite possibilities.
Email Campaigns
Automation Workflows
Contact Management
8,000+ Integrations
Join thousands of businesses using SMASHSEND Custom Fields to create truly personalized email experiences.
Unlimited fields • All data types • Full API access • Free forever