Reachify: 108 ESP Integrations, One Workflow

Sarah Chen

Email Strategy Lead at MiN8T

Published March 2026

Reachify is a SaaS platform that helps mid-market companies manage email campaigns across multiple email service providers. Founded in 2022 in Denver, the 28-person startup serves over 50 client accounts, each of which may use a different ESP -- or multiple ESPs simultaneously for different audience segments.

Their core value proposition is simple: one dashboard to rule all your email channels. But behind the scenes, the complexity of pushing templates to dozens of different ESPs was threatening to consume their engineering team entirely.

1 The Multi-ESP Problem

Every ESP has its own template format, its own import mechanism, and its own quirks. A Mailchimp template uses a merge tag syntax that is completely different from HubSpot's personalization tokens. Klaviyo expects a specific HTML structure for its dynamic blocks. Salesforce Marketing Cloud uses AMPscript. Shopify Email has its own Liquid templating layer.

Reachify's engineering team was maintaining separate export pipelines for each ESP. Every time they wanted to push a campaign template to a client's ESP, they had to:

• Build the email in their internal editor
• Manually adapt the HTML to the target ESP's format requirements
• Test the adapted version in the ESP's preview environment
• Debug rendering differences introduced by the ESP's template engine
• Repeat for each ESP if the client used more than one

For a single campaign going to three ESPs, the process could take an entire day. With 50+ clients, many using 2-3 ESPs each, the backlog was growing faster than the team could clear it.

"We had four engineers spending 70% of their time on ESP format translation. Not building features. Not improving the product. Just converting HTML from one format to another. It was soul-crushing work, and it was the biggest bottleneck in the company."

-- David Okonkwo, CTO at Reachify

2 What Reachify Needed

Reachify evaluated building their own ESP abstraction layer versus adopting an existing solution. The build-vs-buy analysis was clear: building connectors for even 20 ESPs would take 6+ months of engineering time, and maintaining them against API changes would be a permanent tax.

Their requirements for a third-party solution:

• Broad ESP coverage -- not just the big five, but niche and regional ESPs that their clients used
• One-click export -- no manual format adaptation or post-export debugging
• API and SDK access -- Reachify needed to integrate template building and export into their own platform, not use a separate UI
• Template sharing -- the ability to create a master template once and push it to multiple ESPs simultaneously
• White-label capability -- their clients should never know a third-party tool was involved

3 The MiN8T Solution

Reachify integrated MiN8T using its Plugin SDK and REST API. The integration took three weeks from kickoff to production, broken into two phases:

Phase 1: SDK embedding (Week 1-2)

Reachify embedded MiN8T's email editor directly into their platform using the Plugin SDK. Their clients accessed the editor within Reachify's UI, with Reachify's branding and navigation. The editor loaded with the client's brand guidelines pre-configured, so every email started on-brand from the first drag-and-drop.

The SDK integration required fewer than 200 lines of code. Reachify's frontend team completed it in four days, including testing.

Phase 2: Export automation (Week 2-3)

Reachify built an export orchestration layer on top of MiN8T's REST API. When a client clicked "Publish" in Reachify's dashboard, the system called MiN8T's export endpoint with the target ESP(s), received the format-specific HTML, and pushed it directly to the ESP's API. The entire flow -- from clicking "Publish" to the template appearing in the ESP -- took under 10 seconds.

For clients using multiple ESPs, Reachify added a multi-export feature: select two, three, or five ESPs, and the template was pushed to all of them simultaneously. No format differences. No manual adaptation. One click.

"We went from four engineers spending 70% of their time on ESP translation to zero engineers spending any time on it. The MiN8T API handles everything. We just pass the template ID and the target ESP, and we get back perfectly formatted HTML. Every time."

-- David Okonkwo, CTO at Reachify

4 Results by the Numbers

Reachify measured impact over the first 60 days post-integration:

Deployment speed: 92% faster

Template deployment to an ESP dropped from an average of 4.2 hours (including manual format adaptation and debugging) to under 20 minutes (including design, review, and one-click export). For multi-ESP deployments, the savings were even more dramatic -- what previously took a full day now completed in the same 20 minutes regardless of how many ESPs were targeted.

Engineering capacity: 3 FTEs recovered

Three of the four engineers previously dedicated to ESP format translation were reassigned to product development. Within 90 days, Reachify shipped their AI subject line optimizer, an advanced segmentation builder, and a campaign performance dashboard -- features that had been on the roadmap for over a year but were perpetually deprioritized due to the ESP maintenance burden.

Client capacity: scaled without hiring

Before MiN8T, Reachify was turning away prospective clients because they couldn't handle the ESP translation workload. After the integration, they onboarded 12 new client accounts in Q1 2026 with zero additional headcount. Their client base grew from 38 to 50+ accounts.

ESP coverage: from 14 to 108

Reachify's in-house export pipeline supported 14 ESPs. Through MiN8T, they instantly gained access to 108 ESP integrations. This opened doors to client prospects they had previously declined -- companies using niche ESPs like Moosend, Customer.io, ActiveCampaign, or region-specific providers.

5 Technical Deep Dive

For technical teams considering a similar integration, here is how Reachify architected their MiN8T integration:

Plugin SDK for editor embedding

The Plugin SDK provided a JavaScript widget that loaded MiN8T's full drag-and-drop editor inside an iframe. Reachify controlled initialization via the SDK's configuration object, passing the client's brand guideline ID, available template library, and user permissions. The SDK communicated events (template saved, export requested) back to Reachify's application via a postMessage API.

REST API for export orchestration

Reachify's backend called MiN8T's /export endpoint with the template ID and target ESP identifier. The API returned the fully formatted HTML, including ESP-specific merge tags, dynamic content blocks, and tracking pixels. Reachify then pushed this HTML to the ESP's API using their existing connector layer.

Template sharing via API

Master templates were created once in MiN8T and stored with unique IDs. When a client needed the same campaign in multiple ESPs, Reachify called the export endpoint multiple times with the same template ID but different ESP targets. Each response was tailored to the target ESP's format -- no duplication, no drift.

6 What Changed for the Team

Beyond the metrics, the cultural impact at Reachify was significant. Engineers who had spent months on repetitive format translation were suddenly building features they were passionate about. Client onboarding conversations shifted from "which ESPs do we support?" to "which ESPs do you use?" -- because the answer was always "we support it."

Client conversations transformed

Before MiN8T, Reachify's sales team had an uncomfortable qualification question: "Which ESP does the prospect use?" If the answer was something outside their 14 supported ESPs, the deal was dead. Now, with 108 ESPs supported, they close deals they would have walked away from six months ago.

Product velocity accelerated

With three engineers freed from ESP maintenance, Reachify's feature shipping velocity tripled. Their public changelog went from 2-3 updates per month to 8-10. Customer satisfaction scores improved by 22 points.

Operational risk reduced

ESP API changes used to cause emergency scrambles -- a single breaking change in Mailchimp's API had once taken their team offline for two days. With MiN8T handling the ESP translation layer, those changes are absorbed by MiN8T's engineering team, not Reachify's. The operational burden shifted from Reachify's plate entirely.

"The best infrastructure is the kind you don't have to think about. MiN8T turned ESP integration from our biggest engineering headache into something we literally never discuss anymore. It just works."

-- David Okonkwo, CTO at Reachify

Today, Reachify serves over 50 client accounts across every major ESP in the market. Their engineering team builds product, not plumbing. And their clients get campaigns deployed to any ESP in under 20 minutes -- a promise that was impossible to make 12 months ago.