seo: update descriptions for Brevo, Customer.io, and other email alternatives to enhance clarity and appeal

apps/landing/src/pages/guides/email-api-guide.tsx

@@ -6,8 +6,8 @@ import Link from 'next/link';
 export default function EmailAPIGuide() {
   return (
     <GuideLayout
-      title="Email API Guide: Everything You Need to Know with Code Examples"
-      description="Complete guide to email APIs: how they work, implementation examples, best practices, and choosing the right solution for your application."
+      title="What is an Email API? Complete Guide with Code Examples | Plunk"
+      description="An email API lets you send, receive, and manage emails programmatically. Learn how they work, see code examples in Node.js, Python, PHP, Ruby, and Go, and choose the right provider."
       lastUpdated="2025-12-20"
       readTime="12 min"
       canonical="https://www.useplunk.com/guides/email-api-guide"

apps/landing/src/pages/index.tsx

@@ -3,6 +3,7 @@ import {motion} from 'framer-motion';
 import {Bricolage_Grotesque, Hanken_Grotesk, JetBrains_Mono} from 'next/font/google';
 import {DASHBOARD_URI, LANDING_URI, WIKI_URI} from '../lib/constants';
 import React from 'react';
+import {NextSeo} from 'next-seo';
 import Artur from '../../public/assets/artur.png';
 import Joe from '../../public/assets/joe.png';
 import Noah from '../../public/assets/noah.png';
@@ -154,6 +155,15 @@ const tickerItems = [
 export default function Index() {
   return (
     <>
+      <NextSeo
+        title="Plunk — Open-Source Transactional Email Platform"
+        description="Send transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable. $0.001/email, no contact limits."
+        openGraph={{
+          title: 'Plunk — Open-Source Transactional Email Platform',
+          description:
+            'Send transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable. $0.001/email, no contact limits.',
+        }}
+      />
       <Script
         id={`faq-schema-index`}
         type="application/ld+json"

apps/landing/src/pages/tools/markdown-to-email.tsx

@@ -46,13 +46,13 @@ export default function MarkdownToEmail() {
   return (
     <>
       <NextSeo
-        title="Free Markdown to Email HTML Converter | Plunk"
-        description="Convert markdown and rich text to email-safe HTML instantly. Free online tool with live preview. Perfect for email developers and marketers."
+        title="Markdown to Email-Safe HTML Converter | Free Online Tool | Plunk"
+        description="Convert Markdown to email-safe HTML instantly — handles inline styles, table layouts, and compatibility across email clients. Free, no sign-up required."
         canonical="https://www.useplunk.com/tools/markdown-to-email"
         openGraph={{
-          title: 'Free Markdown to Email HTML Converter | Plunk',
+          title: 'Markdown to Email-Safe HTML Converter | Free Online Tool | Plunk',
           description:
-            'Convert markdown and rich text to email-safe HTML instantly. Free online tool with live preview.',
+            'Convert Markdown to email-safe HTML instantly — handles inline styles, table layouts, and compatibility across email clients. Free, no sign-up.',
           url: 'https://www.useplunk.com/tools/markdown-to-email',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk Email HTML Converter'}],
         }}

apps/landing/src/pages/vs/brevo.tsx

@@ -56,12 +56,12 @@ export default function BrevoComparison() {
     <>
       <NextSeo
         title="Brevo (Sendinblue) Alternative: Developer-First & Open Source | Plunk"
-        description="Plunk offers a simpler, developer-focused alternative to Brevo with pay-as-you-go pricing, open-source code, and self-hosting. No contact limits."
+        description="Done with Brevo's contact-based pricing? Plunk is a developer-first, open-source alternative — pay per email not per contact, self-hostable, no contact limits."
         canonical="https://www.useplunk.com/vs/brevo"
         openGraph={{
           title: 'Brevo (Sendinblue) Alternative: Developer-First & Open Source | Plunk',
           description:
-            'Plunk offers a simpler, developer-focused alternative to Brevo with pay-as-you-go pricing, open-source code, and self-hosting.',
+            "Done with Brevo's contact-based pricing? Plunk is open-source, self-hostable, and charges per email not per contact.",
           url: 'https://www.useplunk.com/vs/brevo',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Brevo'}],
         }}

apps/landing/src/pages/vs/customerio.tsx

@@ -52,12 +52,12 @@ export default function CustomerioComparison() {
     <>
       <NextSeo
         title="Customer.io Alternative: Open-Source & Developer-Focused | Plunk"
-        description="Compare Plunk and Customer.io. Customer.io is powerful but complex. Plunk is open-source, developer-friendly, with simple workflows and transparent pricing."
+        description="Frustrated with Customer.io's complexity and cost? Plunk is an open-source alternative with simple workflow automation, transparent pay-as-you-go pricing, and no CRM overhead."
         canonical="https://www.useplunk.com/vs/customerio"
         openGraph={{
           title: 'Customer.io Alternative: Open-Source & Developer-Focused | Plunk',
           description:
-            'Compare Plunk and Customer.io. Plunk is open-source, developer-friendly, with simple workflows and transparent pricing.',
+            "Frustrated with Customer.io's complexity and cost? Plunk is open-source with simple workflow automation and transparent pay-as-you-go pricing.",
           url: 'https://www.useplunk.com/vs/customerio',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Customer.io'}],
         }}

apps/landing/src/pages/vs/index.tsx

@@ -91,13 +91,13 @@ export default function CompetitorsIndex() {
   return (
     <>
       <NextSeo
-        title="Plunk vs Email Competitors | Compare Email Platforms"
-        description="Compare Plunk with Postmark, SendGrid, Mailgun, Mailchimp, ConvertKit, ActiveCampaign, Klaviyo, MailerLite, and more. See why Plunk offers transactional emails plus marketing features in one open-source platform."
+        title="Best Resend, Mailgun & SendGrid Alternatives | Open-Source Email | Plunk"
+        description="Looking for a Resend, Mailgun, or SendGrid alternative? Plunk is open-source, self-hostable, and includes transactional emails, marketing campaigns, and workflow automation — at $0.001/email."
         canonical="https://www.useplunk.com/vs"
         openGraph={{
-          title: 'Plunk vs Email Competitors | Compare Email Platforms',
+          title: 'Best Resend, Mailgun & SendGrid Alternatives | Open-Source Email | Plunk',
           description:
-            'Compare Plunk with 13 leading email platforms. Transactional + marketing emails in one open-source solution.',
+            'Open-source alternative to Resend, Mailgun, and SendGrid. Transactional + marketing emails in one self-hostable platform at $0.001/email.',
           url: 'https://www.useplunk.com/vs',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Competitors'}],
         }}

apps/landing/src/pages/vs/loops.tsx

@@ -56,12 +56,12 @@ export default function LoopsComparison() {
     <>
       <NextSeo
         title="Loops Alternative: Open Source & Self-Hostable | Plunk"
-        description="Plunk offers an open-source alternative to Loops with pay-as-you-go pricing, self-hosting, and no contact limits. Same modern features, full transparency."
+        description="Need more control than Loops offers? Plunk is open-source and self-hostable with pay-as-you-go pricing, no contact limits, and full code transparency."
         canonical="https://www.useplunk.com/vs/loops"
         openGraph={{
           title: 'Loops Alternative: Open Source & Self-Hostable | Plunk',
           description:
-            'Plunk offers an open-source alternative to Loops with pay-as-you-go pricing, self-hosting, and no contact limits.',
+            'Need more control than Loops offers? Plunk is open-source and self-hostable with pay-as-you-go pricing and no contact limits.',
           url: 'https://www.useplunk.com/vs/loops',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Loops'}],
         }}

apps/landing/src/pages/vs/mailgun.tsx

@@ -52,12 +52,12 @@ export default function MailgunComparison() {
     <>
       <NextSeo
         title="Mailgun Alternative: Open-Source with Marketing & Automation | Plunk"
-        description="Compare Plunk and Mailgun. Mailgun focuses on transactional emails, while Plunk adds marketing campaigns, workflows, and is open-source."
+        description="Switching from Mailgun? Plunk is an open-source alternative with pay-as-you-go pricing, marketing campaigns, and workflow automation — no subscription tiers, no lock-in."
         canonical="https://www.useplunk.com/vs/mailgun"
         openGraph={{
           title: 'Mailgun Alternative: Open-Source with Marketing & Automation | Plunk',
           description:
-            'Compare Plunk and Mailgun. Mailgun is excellent for transactional emails. Plunk adds marketing, workflows, and is open-source.',
+            'Switching from Mailgun? Plunk is open-source with pay-as-you-go pricing, marketing campaigns, and workflow automation — no subscription tiers.',
           url: 'https://www.useplunk.com/vs/mailgun',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Mailgun'}],
         }}

apps/landing/src/pages/vs/postmark.tsx

@@ -52,13 +52,13 @@ export default function PostmarkComparison() {
   return (
     <>
       <NextSeo
-        title="Postmark Alternative: Transactional + Marketing Emails | Plunk"
-        description="Plunk offers everything Postmark has for transactional emails, plus marketing campaigns, workflows, and segmentation. Open-source and self-hostable."
+        title="Postmark Alternative: Pay-As-You-Go vs Fixed Pricing | Plunk"
+        description="Postmark starts at $15/month for 10k emails. Plunk charges $0.001/email — no subscription, no minimums. Plus marketing campaigns, workflows, and open-source code."
         canonical="https://www.useplunk.com/vs/postmark"
         openGraph={{
-          title: 'Postmark Alternative: Transactional + Marketing Emails | Plunk',
+          title: 'Postmark Alternative: Pay-As-You-Go vs Fixed Pricing | Plunk',
           description:
-            'Plunk offers everything Postmark has for transactional emails, plus marketing campaigns, workflows, and segmentation.',
+            'Postmark starts at $15/month for 10k emails. Plunk charges $0.001/email — no subscription, no minimums. Plus marketing campaigns and open-source code.',
           url: 'https://www.useplunk.com/vs/postmark',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Postmark'}],
         }}

apps/landing/src/pages/vs/resend.tsx

@@ -51,13 +51,13 @@ export default function ResendComparison() {
   return (
     <>
       <NextSeo
-        title="Plunk vs Resend: Open-Source Alternative with Marketing | Plunk"
-        description="Compare Plunk and Resend. Resend focuses on transactional emails, while Plunk adds marketing campaigns, workflows, and is open-source. Choose based on your needs."
+        title="Open-Source Resend Alternative: Pay-As-You-Go at $0.001/Email | Plunk"
+        description="Resend uses fixed subscription pricing. Plunk is pay-as-you-go at $0.001/email — open-source, self-hostable, with marketing campaigns and workflow automation included."
         canonical="https://www.useplunk.com/vs/resend"
         openGraph={{
-          title: 'Plunk vs Resend: Open-Source Alternative with Marketing',
+          title: 'Open-Source Resend Alternative: Pay-As-You-Go at $0.001/Email | Plunk',
           description:
-            'Compare Plunk and Resend. Resend focuses on transactional emails, while Plunk adds marketing, workflows, and is open-source.',
+            'Resend uses fixed subscription pricing. Plunk is pay-as-you-go at $0.001/email — open-source, self-hostable, with marketing and automation included.',
           url: 'https://www.useplunk.com/vs/resend',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs Resend'}],
         }}

apps/landing/src/pages/vs/sendgrid.tsx

@@ -56,12 +56,12 @@ export default function SendGridComparison() {
     <>
       <NextSeo
         title="SendGrid Alternative: Pay-As-You-Go & Open Source | Plunk"
-        description="Plunk offers pay-as-you-go pricing instead of monthly subscriptions, with a modern API and no complex setup. Open source alternative to SendGrid."
+        description="Tired of SendGrid's pricing tiers and complexity? Plunk is an open-source alternative with pay-as-you-go pricing at $0.001/email, a modern API, and no lock-in."
         canonical="https://www.useplunk.com/vs/sendgrid"
         openGraph={{
           title: 'SendGrid Alternative: Pay-As-You-Go & Open Source | Plunk',
           description:
-            'Plunk offers pay-as-you-go pricing instead of monthly subscriptions, with a modern API and no complex setup.',
+            "Tired of SendGrid's pricing tiers and complexity? Plunk is open-source with pay-as-you-go pricing at $0.001/email and no lock-in.",
           url: 'https://www.useplunk.com/vs/sendgrid',
           images: [{url: 'https://www.useplunk.com/assets/card.png', alt: 'Plunk vs SendGrid'}],
         }}