Instantly.ai requires you to warm up sending domains for weeks before you can send at scale — and even then, deliverability is a daily battle. Contact Form Blaster starts working in minutes with near-100% deliverability, no domain setup required.
| Feature | Instantly.ai | Contact Form Blaster |
|---|---|---|
| Domain warmup needed | Yes — 2–4 weeks minimum | No — start immediately |
| Email list required | Yes — verified addresses | No — just website URLs |
| Deliverability | Variable — spam risk always present | ~100% — no inbox competition |
| Pricing | $37–$358/month | Pay-per-use credits |
| Sending limits | Daily caps per domain | Up to 30,000 per campaign |
| Domain reputation risk | High — one complaint can blacklist | None — no email sending |
| AI personalization | Template variables | Per-site AI messaging |
Every new sending domain needs 2–4 weeks of warmup before you can send volume. New campaign? New niche? Buy another domain, start the warmup clock again. You're managing infrastructure instead of running outreach.
Even perfectly warmed domains hit spam. Gmail and Outlook's AI filters are constantly updated. A single spam complaint spike tanks your sender score overnight. Deliverability is a job in itself.
Instantly charges monthly regardless of campaign volume. Quiet month? Still billed. Between campaigns? Still billed. The model incentivizes the tool maker, not you.
A CSV of website URLs for your target businesses. No email addresses needed. Collect them from Google, directories, or any lead source.
Write one template or enable AI mode to auto-generate personalized messages for each site based on their actual website content.
The platform finds each contact form, fills your details, handles CAPTCHAs, and confirms submission. No email sending — no spam risk.
When prospects respond, it comes to your email directly. No platform inbox — just conversations ready to close.
No. Contact Form Blaster doesn't send email — it submits forms. There's no sending domain to warm up, no SPF/DKIM records to configure, no inbox to manage. You sign up, upload your URL list, and start your campaign the same day.
Yes. Some teams use Contact Form Blaster as the first cold touch (zero spam risk, immediate delivery) and Instantly for follow-up sequences to prospects who engaged. This way your domain reputation stays clean for warm follow-ups while cold volume goes through contact forms.
Sites without a findable contact form are skipped at no charge. Failed submissions (form found but not completable) are billed at 50% of credits. Invalid domains get a full 100% credit back. You only pay full credits for confirmed deliveries.
Sign up free and get free credits. Your first campaign can go out within the hour.
Try Contact Form Blaster Free