Free / Open-sourceAI-assisted email and SMS marketing that turns audiences into customers
Free / Open-sourceAI-assisted email and SMS marketing that turns audiences into customers
Kasplo Email Intelligence records 3,534 monthly visits with -28.1% month-over-month growth and Contact for Pricing pricing. SendBridge records 23,124 monthly visits with -15.1% growth and Freemium, Paid pricing.

See where your email actually lands, and why
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | kasplo.com | sendbridge.com |
| Pricing Model | Contact for Pricing | Freemium, Paid |
| Monthly Visits | 3.53K (3,534) | 23.12K (23,124) |
| MoM Traffic Delta | -1.38K (-28.1%) | -4.1K (-15.1%) |
| Primary Market & Share | 🇮🇳 India (100%) | 🇺🇸 United States (31%) |
| Direct Visits / mo | 1.37K | 9.37K |
| User Rating | 4.1 | 4.3 |
| Supported Platforms | Website | Website |

See where your email actually lands, and why
A seed-based inbox tracker that estimates whether campaigns land in the inbox or the spam folder, so deliverability problems show up before revenue does.
Automated checks for SPF, DKIM and DMARC setup alongside unsubscribe handling and sending-practice compliance, with gaps flagged for repair.
Ranked guidance on which placement signals are hurting performance most, so engineering and CRM teams know what to fix first.
Pairs with Kasplo's pre-send verification to classify valid, risky and invalid addresses and keep avoidable bounces off the list.

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.
Free / Open-sourceAI-assisted email and SMS marketing that turns audiences into customers
Free / Open-sourceAI-assisted email and SMS marketing that turns audiences into customers

Free / Open-sourceThe AI-powered B2C CRM for email, SMS, and personalized marketing at scale
Free / Open-sourceThe AI-powered B2C CRM for email, SMS, and personalized marketing at scale
All-in-one customer platform for email, SMS, CRM, and automation

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

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

Free email spam checker and deliverability test with AI insights
Free email spam checker and deliverability test with AI insights
AI cold outreach that lands in the inbox, not the spam folder
AI cold outreach that lands in the inbox, not the spam folder
Email marketing with automation and inbox monitoring built in
Email marketing with automation and inbox monitoring built in

Volume-priced transactional, marketing, and automation email built for developers and AI agents
Volume-priced transactional, marketing, and automation email built for developers and AI agents

mailX is a free email DNS and deliverability toolkit that runs live checks on SPF, DKIM, DMARC, BIMI, MX, blacklists and mail-server connectivity, then explains in plain English what is broken and how to fix it. It also ships an API and an MCP server so AI agents can run the same diagnostics.
mailX is a free email DNS and deliverability toolkit that runs live checks on SPF, DKIM, DMARC, BIMI, MX, blacklists and mail-server connectivity, then explains in plain English what is broken and how to fix it. It also ships an API and an MCP server so AI agents can run the same diagnostics.
SpecialistFind out if your newsletter will reach the inbox before you hit send
SpecialistFind out if your newsletter will reach the inbox before you hit send