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 812 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
142 tools · page 4 of 4
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.
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.
Portfolio website builder for photographers and artists with client proofing galleries and a commission-free store.
Best for: Wedding and portrait photographers who deliver proofs to clients and sell prints from the same site that hosts their portfolio.
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.
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.
Email verifier and list cleaner.
Best for: Teams cleaning email lists before campaigns.
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.
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.
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.
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.
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.
AI website builder with a white-label CMS and Stripe client billing for agencies.
Best for: Small web agencies that build sites for clients and want to hand over a branded editing dashboard and bill clients from it.
Portfolio site builder for visual creatives with Workflow tools for contracts, proofing and file transfers.
Best for: Working photographers and filmmakers who want their portfolio, client contracts and proof delivery managed in one place.
Funnel builder combining checkout, CRM and email.
Best for: Creators, coaches, ecommerce sellers, and small businesses that want funnels connected directly to checkout, follow-up, CRM, and digital products.
Landing-page builder with AI creation, split testing, heatmaps, and direct marketing integrations.
Best for: Small businesses and marketers that need landing pages they can publish, test, and connect to an existing marketing stack.
Block-based online portfolio builder for designers and illustrators with unlimited media uploads and 4K video.
Best for: Illustrators, 3D artists and motion designers who need a quick portfolio that handles large video and image files.
WordPress performance plugin with cache preloading, unused-CSS removal, delayed JavaScript, and lazy rendering.
Best for: WordPress site owners who want detailed front-end performance controls without configuring multiple separate optimization plugins.
WordPress backup and migration plugin with scheduled backups, remote storage and restores.
Best for: WordPress site owners and agencies that need scheduled off-site backups plus reliable restore and migration tools.
Cross-channel customer engagement platform with journey orchestration, unified profiles, personalization, and Nova intelligence.
Best for: Enterprise lifecycle and growth teams coordinating personalized messaging across multiple digital channels from shared customer data.
Collaborative email-design system with reusable components, live editing, approvals, and ESP synchronization.
Best for: Email design and lifecycle teams that need strict brand consistency, reusable modules, and structured stakeholder approval.
Centralized email-production platform with modular design, approvals and localization.
Best for: Lifecycle and enterprise email teams managing reusable designs, approvals, localization, and multiple sending platforms.
Marketing platform linking pages, email, memberships, helpdesk, calendars, and behavioral automation.
Best for: Course sellers, membership businesses, and online marketers that want customer journeys spanning pages, email, products, support, and access control.
AI-assisted WordPress website builder producing fully editable layouts for advanced visual development.
Best for: WordPress developers and technical agencies that want visual building with deeper structural control than a conventional page builder.
Self-hosted WordPress affiliate management with fraud detection, commission rules, reports, and PayPal payouts.
Best for: WordPress stores and MemberPress sites that want a self-hosted affiliate program tied directly to their ecommerce transactions.
WordPress affiliate link management plugin.
Best for: WordPress affiliate publishers organizing large link libraries.