Mailmodo

Free AI Subject Line Generator by MailmodoNo more writer’s block. Use Mailmodo AI to write subject lines in seconds.What is this campaign about?Pick a toneProfessionalPick an intentDriving CuriosityCapitalization Title caseUse emojisUse personalizationType of campaignOfferTransactionalMilestonePromotionalNewsletterNew CollectionProduct UpdateProduct LaunchEvent EmailsSurvey EmailsNew Feature LaunchOthersWhat stage is the audience at?AwarenessAcquisitionEngagementSalesRetentionShow Advanced FiltersGenerate subject linesTurn your idea into an email with a single promptUse our free AI email template generator to design emails instantly.Generate NowShare this toolGet 3X email conversion with MailmodoCreate & send interactive emails without codingPut revenue on auto-pilot with pre-built journeysSave time with AI-powered email content creationExperience world’s only interactive email marketing platformTry Mailmodo for FreeTalk to a HumanTrusted by 10000+ brandsCreate your next email subject line with one click Say goodbye to writer’s block and quickly create fresh, attention-grabbing email subject lines with just a few clicks. Easily adjust the tone and capitalization to match your brand’s unique style. Then, make your subject line stand out by selecting your email’s goal, type, and where your customer is in their journey. With these powerful customization options, your subject lines will perfectly balance your business goals and your audience’s expectations, helping you connect and convert every time. How to use Mailmodo AI subject line generator Start by typing what your campaign is about. For example, you can say something like “Announcing summer sale” or “Launching a new feature for Pro users.”. Next, pick the tone you want your subject line to have. You could go professional, friendly, playful, or even bold. Select the intent behind your email. Like, are you aiming to drive curiosity, urgency, highlight value, or inspire action Pick your preferred capitalization style. You can go with Title Case, sentence case, or ALL CAPS depending on how you want your subject line to visually appear. Decide if you want to include emojis. If enabled, the AI may add relevant emojis to help your subject line stand out in crowded inboxes. Choose the type of email you want to send, such as promotional, offer, newsletter, product launch, transactional, milestone, and others. Select which stage your reader is in the customer journey, for example, awareness, acquisition, engagement, retention. This makes sure the subject line speaks directly to where your audience is. Once everything is filled out, click Generate Subject Lines, and you will get ready-to-use subject line options in seconds. 💡 Related guide: 150 Email Subject Lines That Grab Attention in 2025 What metrics to track after using AI-generated subject lines After sending emails with AI-generated subject lines, tracking the right metrics is key to understanding their effectiveness and improving future campaigns. Here are the metrics you should keep an eye on: Open rate : Measures the percentage of recipients who opened your email. It’s the primary indicator of how compelling your subject line is. Click-through rate : Tracks how many people clicked links inside your email, showing if your subject line attracted the right audience interested in your content. Unsubscribe rate: Shows if your subject line (and email content) caused recipients to opt out, signaling if the messaging matched their expectations. Spam complaints: Reveals if your emails were marked as spam, which can impact your sender reputation. How to speed up A/B testing with AI suggestions A/B testing helps you find the best-performing subject lines, but creating and managing multiple versions can be time-consuming. AI suggestions speed up this process by generating diverse options quickly, so you can test more ideas and gather insights faster. Here’s how you can A/B subject lines testing process with Free Mailmodo AI subject generator: Decide which metrics you want to improve (like open rates) and pick a representative segment of your email list. Use Mailmodo's free AI subject line generator tool to quickly generate effective subject line options based on data-driven insights. Set up the test in your email platform, sending different subject lines to each segment at the same time. Track open rates and other key metrics to find the winning subject line. Send the winning subject line to the rest of your audience and use what you learned to improve future tests. 💡 Related guide: How to Run A/B Tests on Your Email Marketing Campaigns Frequently asked questionsWhat is an AI email subject line generator?An AI email subject line generator is a tool that uses artificial intelligence to create compelling and personalized subject lines for emails, enhancing engagement and increasing open rates. Mailmodo's AI Subject Line Generator optimizes every character for maximum impact. What are the key features of the AI email subject line generator? Mailmodo's AI Subject Line Generator excels in crafting tailored subject lines, optimizing tone, intent, capitalization, emojis, and personalization. Whether it's a promotional or nurturing campaign, it adapts to various customer phases, ensuring impactful communication.Will the AI generator replace human creativity? No. It’s a tool to speed up brainstorming and provide fresh ideas. Human judgment is key to selecting and fine-tuning the best subject lines. Is there any limit on how many times I can use the tool? No limits! You can generate as many subject lines as you want, whenever you need fresh ideas. How does the tool generate effective subject lines? The AI uses advanced technologies like GPT-3 and GPT-4 to mimic human language and behavior. Explore more toolsAI Email Writer to Generate High Conversion EmailsAI Email Campaign Planner AI Email Campaign Planner AI Email Writer to Generate High Conversion EmailsRelated resourcesSolutionsUse AI for email marketing to boost scalabilityblogsHow Can AI Email Automation Streamline Email OperationsblogsHow AI Email Agents Are Revolutionizing Campaign ExecutionblogsHow AI Email Management Helps You Organize Your InboxblogsTransform Your Email Marketing Workflow with Mailmodo AIYou might also likeAI marketing statisticsAI marketing strategyAI marketing toolsAI business toolsAI in email marketingPopular CategoriesAI MarketingAMP EmailEmail AutomationEmail DeliverabilityEmail DesignEmail MarketingEmail Marketing Use CaseGo to MarketingShopify Email MarketingBuilt with by MailmodoMailmodo is an all-in-one email marketing solution that boosts conversion with interactive emails and the power of AI.With Mailmodo AI, you canGenerate subject lines and preheader in secondsWrite engaging email copy with one clickCreate interactive emails that lets you add calendars, calculators, and forms inside emailsTry it for yourself here --- PricingScale without breaking your bankFlexible plans built for all your email marketing needs. Pay as you grow.MonthlyAnnualSave 20% on Annual Plans2,000 Email Sending Credits1 Team MemberMailmodo AI Features ✨AI Email Template GeneratorAI Email Automation BuilderAI Email Marketing PlannerAI Email Performance AnalyzerAI Contact Segment GeneratorBasic IntegrationsZapierMakeGoogle SheetWebhook / APIMailchimpShopifySegment (Destination)MixPanelFacebookForm Action URLTwilioZoomGoogle CalendarIntercomCustomer IOZendeskHubSpotCleverTapMoEngageWebEngageSegment (Source) A/B Testing Send Time Optimization Timezone Based Scheduling No Mailmodo footer branding Upload Templates Email Click Maps Export Campaign Data via API1 Active Journeys500 Active Contacts/Journey5 API Request / Sec1 Custom Domain Chat & Email Support3,000 Email Sending Credits3 Team MembersMailmodo AI Features ✨AI Email Template GeneratorAI Email Automation BuilderAI Email Marketing PlannerAI Email Performance AnalyzerAI Contact Segment GeneratorAll IntegrationsZapierMakeGoogle SheetWebhook / APIMailchimpShopifySegment (Destination)MixPanelFacebookForm Action URLTwilioZoomGoogle CalendarIntercomCustomer IOZendeskHubSpotCleverTapMoEngageWebEngageSegment (Source) A/B Testing Send Time Optimization Timezone Based Scheduling No Mailmodo footer branding Upload Templates Email Click Maps Export Campaign Data via API10 Active Journeys500 Active Contacts/Journey10 API Request / Sec2 Custom Domains Chat & Email supportUnlimited Email Sending Credits5 Team MembersMailmodo AI Features ✨AI Email Template GeneratorAI Email Automation BuilderAI Email Marketing PlannerAI Email Performance AnalyzerAI Contact Segment GeneratorAll IntegrationsZapierMakeGoogle SheetWebhook / APIMailchimpShopifySegment (Destination)MixPanelFacebookForm Action URLTwilioZoomGoogle CalendarIntercomCustomer IOZendeskHubSpotCleverTapMoEngageWebEngageSegment (Source) A/B Testing Send Time Optimization Timezone Based Scheduling No Mailmodo footer branding Upload Templates Email Click Maps Export Campaign Data via APIUnlimited Active JourneysUpto 100K Active Contacts/Journey50 API Request / Sec4 Custom Domains Dedicated Chat, Email & Call supportEnter with an idea. Exit with a winning email campaign.Get started for free All Plans IncludeAI Email ToolsAI Email Template BuilderAI Email Campaign GeneratorAI Email Segment GeneratorAI Email Automation BuilderAI Email Marketing PlannerAI Email Performance AnalyzerAI Email Template RemixerAI Email Marketing AssistantEditor & TemplatesCreate Unlimited TemplatesPre-made Building BlocksDynamic PersonalizationAMP / HTML EditorSmart Template SuggestionsShare TemplatesRich Text EditorExport Template SubmissionsCampaignsCreate Unlimited CampaignsSend Bulk CampaignsSend Triggered Campaign Via API & WebhookSend Triggered Campaign Via Bulk List TriggerOpen Rate RecommendationContact Management & EventsCSV ImportAPI Import (Individual and Batch)Import via Form Action URLSupression ListStatic SegmentDynamic SegmentReporting and AnalyticsAggregated Contact Level AnalyticsAggregated Campaign Level AnalyticsAggregated Journey Level AnalyticsAll Interactive WidgetsPollCreate engagement with opinion pollsAll PlansLive Price TickerDisplay real time market dataAll PlansStar RatingGet feedback with star ratingAll PlansNPS RatingMeasure loyalty and customer satisfactionAll PlansThumbs up or downGet instant feedback with thumbs up/downAll PlansChip selectionGet feedback with choice chipsAll PlansEmoji RatingKnow the mood of your audience with emojisAll PlansSpin the wheelGamify your promotions with spin the wheelAll PlansQuizGamify your email with interactive quizzesAll PlansAdd to calendarAdd event to user’s calendar with one click inside emailNot Available in LiteCarouselDisplay catalogs & decks with an interactive sliderAll PlansZoom Webinar RegistrationSend emails with Zoom registration formNot Available in LiteGokwikSend abandoned cart campaigns to customersAll PlansShopify Cart AbandonmentImprove the recovery rate of abandoned cartsAll PlansShopify Product RecommendationShopify Product RecommendationAll PlansCompare pricing with other toolsMailmodo provides unbeatable value and undeniable ROI at a price point that will leave you grinning.Annual PlansUpto 10000 Contacts $59 $64 $149 $166 $88 $73 Upto 25000 Contacts $119 $160 $389 $215 $160 $159 Upto 50000 Contacts $199 $221 $609 $360 $315 $289 Upto 75000 Contacts $343 $342 Custom $503 $416 $400 Upto 100000 Contacts $399 $425 Custom $602 $624 $440 Compare Mailmodo with other Email Marketing PlatformsCheck nowHere’s what our customers sayMailmodo is a customer-centric organisation with an outstanding support team and professional services that delivered immediate outstanding ROI.Leonard YampolskyCIO at NCBMailmodo is a no-brainer for fast-growing companies. Their no-code interactive emails are easily configurable, and their team is knowledgeable in best practices to ensure high open rates. Rose WangStrategy & Ops, Bluesky PBLLCI find Mailmodo’s interface extremely clean, extremely intuitive. The platform has provided a variety of templates and design options to choose from, which saves me a ton of time.FelixCEO of ADP ListTrusted by 5000 companies in 20 countriesTrusted by 5000 companies in 20 countriesOur customers have seen legendary growth with us257%increase in survey responsesLearn more2.3xincrease in webinar sign-upsLearn more137%higher real-estate leadsLearn more45%survey responsesLearn moreRead all customer storiesAre you an NGO orNot-for-Profit organization?Get discounted plans*Terms & Conditions applyFrequently asked questionsEverything you need to know about the product and billingHow is Mailmodo different from other email marketing software?Unlike traditional platforms, Mailmodo uses AI to generate campaign strategies, templates, subject lines, segmentations, and automations instantly. You save time on planning and execution while ensuring campaigns are optimized for engagement and conversions.Do I need design or technical skills to use Mailmodo?Not at all. Mailmodo’s AI-powered email marketing platform generates ready-to-use templates, subject lines, and automation flows. You can make quick edits if needed, but you don’t need coding or design expertise to get started.How quickly can I launch my first campaign with Mailmodo?In just a few minutes. With one prompt, Mailmodo generates your email strategy, templates, and automation flows so you can go from idea to live campaign almost instantly.Can Mailmodo help me automate customer journeys?Yes. As an AI email marketing platform, Mailmodo creates multi-step automation flows like onboarding sequences, lead nurturing campaigns, or re-engagement journeys — all customized to your goals.Can I send transactional emails with Mailmodo?Of course. Mailmodo's API for Transactional Email enables developers to set up transactional email campaigns using REST API without having to code the emails.What are interactive emails, and how does Mailmodo help create them?Interactive emails let recipients take action right inside the email—whether it’s filling forms, booking meetings, making purchases, or answering polls—without leaving their inbox. With Mailmodo’s AI-powered templates and drag-and-drop editor, you can create interactive AMP email campaigns in minutes, complete with automation flows, boosting engagement and conversions effortlessly.Are there any limitations on interactive emails created by Mailmodo?Mailmodo uses both AMP for Email and CSS Interactivity to cover major email clients so that your email subscribers get unique email experiences. Even though at present, AMP email is supported only by Gmail, GSuite, Yahoo, Fair.email, and Mail.ru, we have innovated to extend the interactive experience to Apple Mail as well. Moreover, if a user's email client doesn't support AMP or CSS interactivity, the recipient will see a plain HTML fallback email we provide options for.Still confused about pricing? Let us help.Talk to us Try Mailmodo for Free --- We’re proud to be leading the email revolutionAt Mailmodo, we use advanced AI to help marketers plan, create and automate beautiful and interactive email campaigns and journeys that perform like no other. 0K+Businesses served0K+Email campaigns launched annually0K+Email templates built annually0B+Emails sent annuallyWe're redefining how you do email marketingCreating email templates became faster with drag-and-drop builders, but email marketing is more than just designing templates. Marketers spend much of their time and creative energy creating campaign plans, automating campaigns and analyzing results. So we built Mailmodo AI to help them in each step of email marketing.How it all startedOur vision was to revolutionize email marketing as a whole.Our first step was to transform emails from static messages into engaging experiences. So we built interactive emails that let subscriber fill forms, answer questions and complete bookings directly inside their inboxes. This foundation continues to help marketers achieve higher engagement and better conversions, now amplified further by AI. Remember this clunky way of having CTAs in emails?Milestones that shaped MailmodoReinventing email marketing, one milestone at a time It’s been an exciting journey,so far.2018-19AMP technology is releasedInteractive emails become a possibility but still not easily available for marketers.2021Mailmodo LaunchesWe release a complete platform for marketers to create and run interactive emails hassle-free.2022YC & Sequoia FundingY Combinator & Sequoia notice the potential of Mailmodo and we get our first investment.2024Mailmodo 2.0We go beyond AMP technology and launch interactivity for Apple Mail, too.2025Mailmodo AIWe launch Mailmodo AI that can create and automate complete email campaigns and more.Trusted by brands“Mailmodo AI transforms a boring email template into a modern and creative one in just a few seconds.”Aryan BhogaleMarketing ManagerGet involvedJoin us in our mission toward a frictionless, engaging future.Marketing TribeDive into the world of Mailmodo through interactive webinars, creative sessions, and AMAs. Join the Marketing Tribe to stay on top of what’s new in the space and actively participate in discussions with our team!Join Marketing Tribe ->PartnershipsLet’s team up! If you're looking to integrate or co-create, let’s chat. Together, we can create magic and make unique, creative ideas possible.Become a Partner ->Mailmodo AffiliateBecome a Mailmodo affiliate and earn commission on your referrals while helping businesses discover the power of interactive emails. Join our affiliate program today.Apply now ->The future of email marketing is hereTry Mailmodo for free -> --- Features that put your email conversions firstDiscover features that boost your email marketing ROI like never beforeTry Mailmodo for FreeTalk to a HumanAll FeaturesEmail CreationInteractive EmailsEmail Automation Email CampaignsDeliverabilitySegmentationAnalyticsAI Email AssistantEducation and SupportIntegrations & APIAll FeaturesDrag-and-Drop EditorDesign emails with no-code, drag-and-drop email editorSmart SuggestionsGet smart template recommendations for your campaignsBrand KitCreate a consistent email identity with your brand kitWYSIWYG EditorCreate beautiful, no-code emails with our WYSIWYG editorAMP EmailsFocus on conversions with interactive AMP EmailsInteractive Email SurveysCollect insights with customizable online surveys in emailEmail SequenceTarget customers on autopilot with automated email sequencesTransactional EmailsEnsure quick and reliable transactional email deliveryPrebuilt Email AutomationsSet up email automation with pre-designed templatesCustomer Engagement Engage your customers at every step of their journeyNewslettersCreate and manage newsletters effortlesslyBulk CampaignsSend emails in large volumes without a hitchEmail DeliverabilityEnsure your emails always reach the inboxList/Contact SegmentationOrganize and segment contacts for better targetingEmail Analytics Optimize your campaigns with real-time email analyticsAI Template GeneratorAutomatically generate email templates using AIRemix with AIInstantly revamp any email template to fit your needs with AIAI Subject Line GeneratorGenerate high-performing subject lines effortlesslyOnboarding SupportGet 1:1 support with migration and onboarding from our teamHelpful GuidesDetailed articles on the latest email marketing strategies for marketersCampaign IdeasGet fresh email marketing ideas and strategies every monthTransactional Email APISend timely transactional emails with our APISegment Events APIHyper-personalize emails with events data from SegmentMailmodo for DevelopersExplore various transactional email use-cases for Mailmodo APIZapier Connect with 3000+ tools to transfer data and trigger campaignsHubSpotIntegrate your inbound marketing and sales dataClevertapIntegrate with your customer engagement and retention platformCustomer.ioIntegrate your automated messaging campaignsEnter with an idea.Exit with a winning email campaign.Brainstorm email campaign ideas with Mailmodo’s AI assistantBuild precise segments in seconds with AI segmentationGenerate ready-to-use email templates with AIExperience true AI email marketing automation with MailmodoGet started for freeTalk to a HumanTrusted by 10000+ brands