One platform, twelve product pages, three buying contexts
4notify started as the messaging layer for a multi-tenant B2B platform with thousands of small businesses pushing transactional notifications through it every day. That origin shaped two things about the product. First, every channel — email, SMS, WhatsApp, webhook — runs on the same delivery substrate, with the same consent model, the same audit log, the same rate limiter. Second, the platform treats individual notifications the way an engineer would: signed, idempotent, replayable, with metadata that survives across systems.
For US customers, that translates into a customer-communications stack you can put under SOC 2 review, point at Gmail and Yahoo's 2024 bulk-sender rules, and still hand to a marketing team that wants to run a drip with a holdout group. Pricing is per-send rather than per-seat, the API is the same one our own platform uses in production, and the deliverability tooling is the standard plan, not an upsell.
Everything below links to a dedicated product page with the full feature breakdown, code samples, and pricing notes. The page you are on now is the catalog — a single entry point so a buyer or an engineer can decide whether 4notify is worth a deeper look without clicking into half the navigation.
Messaging APIs
Reach customers on the channel they actually open — email, US-native SMS, WhatsApp Business, and any system you can point a webhook at.
Transactional Email API
REST and SMTP endpoints for receipts, password resets, and product alerts — built for US sender requirements.
Open the pageUS SMS Gateway
10DLC, toll-free and short-code SMS for customer alerts, MFA, and field-service updates.
Open the pageWhatsApp Business API
Official Cloud API access for utility, authentication, and customer-care conversations.
Open the pageWebhook Relay
Fan-out, retries, and signature verification for outbound HTTP events that need to actually arrive.
Open the pageLifecycle & Automation
Move beyond one-off sends. Trigger flows from product events, sequence messages across channels, and adapt copy to who is reading it.
Event-Driven Flows
Trigger multi-step journeys from product events without writing glue code in your application.
Open the pageDrip Sequences
Scheduled multi-message campaigns with time-zone awareness and behavioral exits.
Open the pageAudience Segmentation
Build segments from product events and user attributes; targets stay live as data changes.
Open the pageSplit Testing
Run A/B and multivariate tests on subject lines, send times, and content blocks with confidence intervals.
Open the pageDeliverability & Observability
Know what happened to every message — and why — without piecing it together from carrier exports and inbox screenshots.
Deliverability Console
Sender reputation, DMARC failures, and inbox placement in one dashboard.
Open the pageOpen, Click & Conversion Tracking
Engagement tracking that survives Apple Mail Privacy Protection and ad-blockers.
Open the pageMessage Audit Logs
Every send, retry, signature, and webhook delivery, searchable for the legally required retention period.
Open the pageSLA Alerts & Anomalies
Detect deliverability drops, bounce spikes, and webhook failures before customers notice.
Open the pageWho 4notify is actually built for
If two of these four describe your team, the product page links above will probably feel like they were written for you.
Teams who want a clean REST API, idempotency keys, and signed webhooks instead of a marketing tool with an API bolted on.
Healthcare, fintech, education, and legal workflows where the audit log, consent ledger, and DMARC alignment have to survive an external review.
Marketers who run drips and A/B tests but also need the same engine to send the receipt that closes the loop on conversion.
Anyone serving notifications on behalf of customers — with per-tenant sender domains, per-tenant analytics, and per-tenant rate limits.
How 4notify compares
Snapshot of where the work goes if you build messaging in-house, pick a generic transactional-email or SMS vendor, or run on 4notify.
| Capability | DIY | Generic vendor | 4notify |
|---|---|---|---|
| Gmail / Yahoo 2024 sender rules | Manual configuration of DMARC, list-unsubscribe, complaint loop | Documentation pointing to your DNS provider | Validated at domain verification; daily check thereafter |
| 10DLC brand + campaign registration | Direct submission to The Campaign Registry | Handled by reseller, vetting score not visible | Submitted on your behalf with vetting score and throughput surfaced |
| Audit log retention | Engineering-built logging pipeline | 30–90 days, then export to S3 yourself | 13 months default; extendable per channel for regulators |
| Cross-channel cascade with fallback | Application code in every send call | Possible but priced per channel | Native in flow editor; pricing visible per cascade step |
| Anomaly detection on delivery health | Custom Grafana dashboards | Static-threshold email reports | Per-channel statistical baselines with PagerDuty / Opsgenie routing |
Ready to wire up the first channel?
Most US customers start with the transactional email API — it's the highest-leverage change and it shows the platform's behavior under your own DKIM and DMARC records. The SMS gateway, WhatsApp integration, and lifecycle automation slot in afterwards on the same account.