True cost comparison — not just what the pricing page says
Quick Verdict
ConvertKit saves you 5%
Best for SendGrid
Creator-focused email marketing platform (now branded as Kit). Free for 10,000 subscribers but limit
Best for ConvertKit
Twilio's email delivery platform for transactional and marketing emails. Free for 100 emails/day, th
Twilio's email delivery platform for transactional and marketing emails. Free fo...
Advertised
$0
/month
True Cost
$105
/month (typical)
Dedicated IP Required for Deliverability
Shared IP on lower plans hurts deliverability. Dedicated IP costs $20-$40/mo extra and requires Pro ...
Email Validation Add-On
Email address validation to reduce bounces costs $0.003-$0.01 per validation. Validating a 50K list ...
Overage Email Charges
Exceeding monthly email limit incurs overage at $0.00085-$0.001 per email. 100K extra emails = $85-$...
Creator-focused email marketing platform (now branded as Kit). Free for 10,000 s...
Advertised
$0
/month
True Cost
$109
/month (typical)
Subscriber-Based Pricing Scaling
Creator plan: 1K subs = $29/mo, 5K = $79/mo, 10K = $119/mo, 55K = $379/mo. Cost roughly doubles ever...
Free Plan Send Restriction
Free plan allows only 1 email broadcast per month to 10,000 subscribers. Daily or weekly newsletters...
No A/B Testing on Free or Creator
A/B testing subject lines requires Creator Pro ($59/mo minimum). Creator plan only supports basic br...
$25/mo annual
$50/mo annual
Affiliate link — we may earn a commission
ConvertKit advertises $0/mo. SendGrid advertises $0/mo.
ConvertKit has 3 documented hidden fees. SendGrid has 3.
ConvertKit confidence: 76%. SendGrid confidence: 75%.
| Metric | SendGrid | ConvertKit | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $0/mo | SendGrid |
| True Monthly Cost | $105/mo | $109/mo | SendGrid |
| Hidden Fee Total | +$105/mo | +$109/mo | SendGrid |
| # Hidden Fees | 3 | 3 | SendGrid |
| Confidence Score | 75% | 76% | ConvertKit |
| Pricing Tiers | 3 | 3 | — |
| Affiliate Program | None | 30% recurring for 24 months | — |
Try the tool that fits your needs. Both offer free trials or free tiers.
From $0/mo
✓ Saves 5% on true costAffiliate link — we may earn a commission
SendGrid advertises $0/mo and ConvertKit advertises $0/mo. However, when you include hidden fees, SendGrid has 3 documented hidden fees adding +$105/mo, while ConvertKit has 3 hidden fees adding +$109/mo. Based on true cost, ConvertKit is typically 5% cheaper.
SendGrid has 3 documented hidden fees: Dedicated IP Required for Deliverability, Email Validation Add-On, Overage Email Charges. These add approximately +$105/mo on top of the $0/mo advertised price.
ConvertKit has 3 documented hidden fees: Subscriber-Based Pricing Scaling, Free Plan Send Restriction, No A/B Testing on Free or Creator. These add approximately +$109/mo on top of the $0/mo advertised price.
Choose SendGrid if: Creator-focused email marketing platform (now branded as Kit). Free for 10,000 subscribers but limit. Choose ConvertKit if: Twilio's email delivery platform for transactional and marketing emails. Free for 100 emails/day, th. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is based on manual research of official pricing pages, terms of service, and user reports. SendGrid data has a 75% confidence score and ConvertKit has 76%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
Enter your usage to see personalized pricing for both tools
Use Free Calculator