Validity Engage (formerly Litmus)
Email previews, testing and collaboration for email teams.
Best for: Email marketing teams QA-ing campaigns across inboxes.
Search and filter 816 marketing tools by category, price, business type, and features.
Ranked by Overall Score: our Editor Rating and Market Signal, 50/50. Market Signal uses Ahrefs and Semrush data through September 2026, pulled October 6 to 19, 2026. How we score
194 tools · page 5 of 6
Email previews, testing and collaboration for email teams.
Best for: Email marketing teams QA-ing campaigns across inboxes.
Cold-email platform with inbox rotation, deliverability monitoring, conditional sequences, and centralized replies.
Best for: B2B sales teams and agencies running cold outreach across multiple mailboxes while monitoring deliverability and reply handling.
Cart and visitor recovery platform using email, SMS, push, and behavioral reminders for abandoned sessions.
Best for: Ecommerce, hospitality, and booking businesses that want automated follow-up for abandoned carts, browsers, and reservations.
WordPress security platform focused on vulnerability intelligence, virtual patching, and plugin-level protection.
Best for: WordPress site owners, agencies, and hosting providers that want vulnerability-focused protection and virtual patches for plugins and themes.
Open-source publishing platform with newsletters, memberships, subscriptions, analytics, and extensible APIs.
Best for: Independent publishers, newsletters, and membership businesses that want website publishing, email delivery, and paid subscriptions under their own brand.
Customer data and marketing automation platform joining journeys, analytics, email, SMS, and audience profiles.
Best for: SaaS and digital businesses that want lifecycle automation, customer data, and reporting tied together around behavior-based journeys.
Continuous vulnerability management platform for external infrastructure, cloud environments, and web applications.
Best for: Small and midsize security teams that need recurring vulnerability scanning and prioritization across external infrastructure and cloud assets.
WordPress site-building suite combining a theme, block library, templates, and ecommerce extensions.
Best for: WordPress creators and agencies that want a theme-and-block toolkit with reusable design controls and WooCommerce support.
Quote-to-cash platform for recurring, usage-based and hybrid billing, payments, collections and revenue recognition.
Best for: Mid-market and enterprise subscription businesses that need billing, payments, collections and revenue recognition on one platform.
Email verifier and list cleaner.
Best for: Teams cleaning email lists before campaigns.
Commerce operations platform for multichannel inventory, orders and listings.
Best for: Multichannel retailers that need to coordinate stock, orders, listings, and fulfillment across marketplaces and warehouses.
Lightweight WordPress SEO plugin automating metadata, schema, sitemaps, redirects, and image alt text.
Best for: WordPress sites that want minimal-setup SEO automation while retaining compatibility with major builders and multilingual plugins.
Email deliverability and inbox placement testing.
Best for: Email senders diagnosing why messages land in spam.
WordPress caching plugin with preload, minification and lazy loading.
Best for: WordPress site owners wanting straightforward page caching with optional image, JavaScript, and database optimization.
WordPress backup plugin with scheduled jobs, restores and cloud destinations.
Best for: WordPress administrators who want scheduled backups sent to several cloud or self-managed storage destinations.
Rokt-owned Shopify app for one-click post-purchase upsells, checkout offers and cart upsells.
Best for: Shopify merchants on any plan who want added revenue after checkout, with Plus stores also using in-checkout upsells.
Sales engagement platform for cold email, calling, LinkedIn tasks and lead follow-up.
Best for: Sales development teams and agencies that want structured cold outreach with email plus phone and LinkedIn steps.
Curated product-research platform for dropshippers with trend data, ad intelligence, and supplier information.
Best for: Dropshippers who want curated product opportunities supported by ad examples, competitor information, and supplier data.
Developer-oriented WordPress form builder with calculations, MCP control, encryption, and extensive native integrations.
Best for: WordPress developers building complex forms that need advanced logic, calculations, integrations, or AI-assisted management.
Self-hosted WordPress affiliate plugin with referral tracking, commissions, affiliate portals, and bulk payouts.
Best for: WordPress stores and membership sites that want an affiliate program managed inside their own website.
Cold-outreach platform with sender infrastructure, automated warmup and centralized replies.
Best for: Sales teams and outbound agencies operating large mailbox pools and wanting deliverability, replies, calling, and CRM activity centralized.
Visual email builder generating responsive HTML for 50-plus clients with direct ESP uploads.
Best for: Marketing teams that want to design reusable responsive email templates before pushing them into an existing sending platform.
Full-service feed and order platform syndicating product data to 2,000+ channels and AI surfaces.
Best for: Enterprise retailers and brands that want a managed team to run feeds and marketplace listings across many channels.
Enterprise product-content platform for feeds, marketplaces, retailer syndication and supplier onboarding.
Best for: Large brands, retailers and manufacturers that syndicate product content to retailers and marketplaces in many countries.
Continuous pentest platform pairing AI-driven DAST scanning with expert-led penetration testing.
Best for: SaaS companies and engineering teams that need recurring pentests and compliance-ready reports for SOC 2 or ISO 27001 audits.
Marketing attribution and intelligence for ecommerce growth.
Best for: Ecommerce brands with meaningful multi-channel ad spend.
Multichannel sales-engagement platform combining prospecting, email and LinkedIn.
Best for: SDR teams and outbound sales organizations coordinating email, LinkedIn, calling, CRM activity, and AI-assisted prospecting.
Ecommerce messaging platform combining email, SMS, reviews and onsite forms.
Best for: Ecommerce brands that want email, SMS and product reviews tied closely to store purchase behavior.
Ecommerce AI suite for site search, recommendations, personalized email, audience segments and shopping chat.
Best for: Webshops on platforms such as Shopify, WooCommerce, Magento or Shopware that want search, recommendations and email personalization from one vendor.
Application security platform covering web, API and mobile.
Best for: Security teams that need coordinated testing and monitoring across web applications, APIs, mobile apps, and exposed digital assets.
WordPress affiliate-program plugin with referral tracking, smart commissions and dashboards.
Best for: WordPress ecommerce, membership, course, and lead-generation businesses that want to operate their own affiliate program.
Shopify subscription platform with customer self-service, passwordless login, bundles, and churn-reduction flows.
Best for: Shopify brands that want subscription self-service and retention tooling without heavily customizing their storefront.
External attack-surface and application security testing driven by automated scans and security researcher findings.
Best for: Application-security and security teams that need continuous testing of internet-facing web assets and externally exposed attack surfaces.
Ecommerce suite for ad feeds, marketplace selling, price intelligence and reseller monitoring.
Best for: Brands and retailers selling through many marketplaces and resellers that need price and channel monitoring alongside feeds.
AI personalization app for Shopify, BigCommerce and SHOPLINE stores covering recommendations, bundles and offers.
Best for: Shopify, BigCommerce and SHOPLINE merchants who want personalization set up without a developer.
Enterprise subscription-commerce platform for recurring programs, replenishment, loyalty, and retention optimization.
Best for: Enterprise retailers and consumer brands running large-scale subscribe-and-save or replenishment programs across existing commerce infrastructure.