All-in-one customer platform for email, SMS, CRM, and automation
Instantly records 2,336,279 monthly visits with +6% month-over-month growth and Paid, Contact for Pricing pricing. SendBridge records 23,124 monthly visits with -15.1% growth and Freemium, Paid pricing.

Verify and clean email lists before you hit send
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | instantly.ai | sendbridge.com |
| Pricing Model | Paid, Contact for Pricing | Freemium, Paid |
| Monthly Visits | 2.34M (2,336,279) | 23.12K (23,124) |
| MoM Traffic Delta | +131.38K (+6%) | -4.1K (-15.1%) |
| Primary Market & Share | 🇺🇸 United States (47.7%) | 🇺🇸 United States (31%) |
| Direct Visits / mo | 1.82M | 9.37K |
| User Rating | 4.4 | 4.3 |
| Supported Platforms | Website | Website |

Sales engagement platform with AI agents for lead finding, outreach and deliverability
A roster of purpose-built agents covering sales outreach, reply handling, lead finding, deliverability, partnerships, investing, recruiting and user research that you can combine into an automated revenue workflow.
Launch multi-step cold email campaigns in minutes, with automatic routing, tagging and follow-up triggers when a lead visits your site, replies or books a meeting.
Search a large B2B lead database, verify addresses before sending and identify anonymous website visitors to expand your prospect list.
Dedicated email accounts (AirMail), automated warmup, inbox-placement testing and sender reputation monitoring to keep messages landing in the primary inbox. There is no AI-generated or role prose youll want to keep.

Verify and clean email lists before you hit send
Every address is classified as Deliverable, Undeliverable, Risky or Unknown, so you know exactly why a contact should be kept, throttled or dropped.
Detects the address types that quietly wreck campaigns, including spam traps, role accounts, catch-all domains and disposable inboxes.
Upload a list in the client area and download a cleaned file in Excel XLSX, CSV or TXT while keeping your original row order.
Verify addresses in real time on signup or import with documented examples for Go, Java, PHP, Python and .NET.
All-in-one customer platform for email, SMS, CRM, and automation
SpecialistExcels at multi-source data enrichment and custom AI workflows, but requires more setup than out-of-the-box cold email tools.
Delivers enterprise-grade revenue intelligence and deal execution tools, but is significantly more expensive and complex than Instantly.

AI-native cold email platform for scaling outbound without limits

Email marketing with AI send-time optimization to lift opens
Email marketing with AI send-time optimization to lift opens

Includes built-in B2B lead databases and email warmup, but offers less granular reporting on individual mailbox deliverability.
Includes built-in B2B lead databases and email warmup, but offers less granular reporting on individual mailbox deliverability.

Real-time email verification and email finding that never stores your data
Real-time email verification and email finding that never stores your data

Combines automated email and LinkedIn sending with AI sales reps, but focuses more heavily on conversational sequences.
Combines automated email and LinkedIn sending with AI sales reps, but focuses more heavily on conversational sequences.
Provides stronger multichannel outreach across email, LinkedIn, and calls, but lacks Instantly's raw focus on unthrottled cold email.

Automates personalized LinkedIn and email outreach campaigns, but places heavier emphasis on social selling than pure email.
Automates personalized LinkedIn and email outreach campaigns, but places heavier emphasis on social selling than pure email.

Free email spam checker and deliverability test with AI insights
Free email spam checker and deliverability test with AI insights

SpecialistTurns natural language prompts into targeted B2B contact audiences, but offers fewer traditional cold email sequencing controls.
SpecialistTurns natural language prompts into targeted B2B contact audiences, but offers fewer traditional cold email sequencing controls.