⚡ Veredito rápido:
- Preços: Instantly starts at $30/month with unlimited email accounts. Warmbox starts at $15/month for one inbox.
- Ideal para: Instantly for full cold email campaigns and automated outreach. Warmbox for warm up only, pairing with existing tools.
- Principal diferença: Instantly turns leads into book meetings through send emails plus B2B lead database. Warmbox handles only the warm up process.
- Nossa escolha: Instantly for most users — unlimited email warmup, lead finder, and unified inbox in one platform makes informed decisions easier.
Are your cold emails landing in the spam folder instead of the inbox?
You’ve built your lead lists.
You’ve written subject lines that should boost response rates.
But none of it matters if email providers flag your sending reputation.
That’s where Instantly and Warmbox come in.
Both tools warm up your inbox to dodge spam filters.
But one is a full sales engagement platform with advanced automations.
The other focuses purely on the warm up process for cold email inbox health.
We compared both tools for four weeks across multiple email providers.
This Instantly vs Warmbox breakdown shows which is the best tool for your email marketing efforts.
Visão geral
This Instantly vs Warmbox comparison covers pricing, features, and deliverability.
Também analisamos para quem cada ferramenta funciona melhor.
Our writers signed up for both platforms and tested core features.
Sources include G2 reviews, published documentation, and hands-on use.
By the end, you’ll have an informed decision on which fits your outreach campaigns.
O que é "instantaneamente"?
Instantly AI is a sales engagement platform and cold email outreach tool.
It uses AI to help sales and marketing teams automate lead generation.
Equipes de vendas usar instantaneamente to run large-scale email campaigns.
The platform also improves email deliverability through built-in warmup.
Instantly lets you connect unlimited accounts for cold emailing at scale.
Its warmup feature has over 1.5 million users in the largest peer-to-peer deliverability pool.
Imediatamente
⭐ 4.3/5 | The all-in-one cold email platform. Connect unlimited email accounts. Send thousands of personalized emails. Find verified leads from a 450M+ B2B lead database. Book meetings on autopilot.
Preços instantâneos
Eis o custo do Instantly em 2026.
The growth plan starts at $30/month and includes unlimited email warmup.
| Plano | Preço | Ideal para |
|---|---|---|
| Crescimento | $ 30/mês | Solo founders running cold email campaigns |
| Hipercrescimento | US$ 77,60/mês | Growing teams sending thousands of emails |
| Velocidade da luz | US$ 286,30/mês | Agencies managing separate campaigns at scale |
| Empresa | Preços personalizados | Grandes equipes de vendas com necessidades específicas |
Preços verificados em março de 2026.
Teste grátis: Sim, período de teste gratuito de 14 dias sem necessidade de cartão de crédito.
Garantia de reembolso: 14-day refund window on monthly plans.
📌 Observação: Every Instantly plan includes unlimited email warmup at no extra cost. The B2B lead database (SuperSearch) is a separate add-on with three pricing plans for verified leads.
⚠️ Aviso: Prices shown are annual billing. Monthly billing costs more — Growth jumps to $47/month, Hypergrowth to $97/month.
Principais benefícios do Instantly
Eis o que torna o Instantly uma opção a ser considerada:
- Contas de e-mail ilimitadas: Connect and rotate sending volume across an unlimited number of email accounts within a single campaign. This protects your domain’s sending reputation as you scale.
- Largest Deliverability Network: The warmup feature has over 1.5 million users, making it the largest peer-to-peer deliverability pool. Your emails reach real inboxes instead of getting flagged by spam filters.
- Localizador instantâneo de leads: SuperSearch gives you access to a B2B lead database of over 160 million contacts. Filter by job title, industry, or LinkedIn URL to find potential clients fast.
- Construtor de campanhas com inteligência artificial: A IA assistente generates email content, subject lines, and full sequences using custom variables. It handles personalized emails at scale.
- Caixa de entrada unificada: Unibox manages all campaign replies from a single interface. The AI categorizes responses by intent to speed up follow ups.
- Análise de campanhas: Track open rates, reply rate, and conversion data across separate campaigns. The platform helps you scale your outreach with informed decisions.
- Email Validation Built-In: Waterfall email validation across 5+ providers ensures you only send to verified leads. This protects your sender reputation from bounces.
O que nossa equipe observou
Our writer signed up for Instantly in February and ran cold email campaigns through the platform for several weeks. Here’s what stood out from that hands-on time:
Prós e contras instantâneos
✅ Prós
- Contas de e-mail ilimitadas em todos os planos pagos.
- Built-in B2B lead database with 160M+ contacts
- Unified inbox handles all campaign replies
- Maior rede de aquecimento com mais de 1,5 milhão de usuários.
- Teste grátis por 14 dias, sem necessidade de cartão de crédito.
❌ Contras
- Lead finder costs extra on top of base plan
- Learning curve steeper than warmup-only tools
- Nativo CRM integrations more limited than competitors
- Monthly billing significantly higher than annual
O que é Warmbox?
Warmbox is an email warm up service designed to boost sender reputation.
It helps your emails reach the inbox instead of the spam folder.
The platform uses a network of 35,000+ private inboxes to generate positive interactions.
Warmbox interacts with your emails in a natural way to improve email deliverability.
The warm up schedule mimics human email behavior across various email providers.
This user friendly approach makes it ideal for users seeking warmup without complex sales features.
Caixa de aquecimento
⭐ 4.5/5 | A focused email warm up tool. Warm up your cold email inbox in minutes. Connect Gmail, Outlook, or any SMTP. No more spam — your emails reach real inboxes.
Preços do Warmbox
Warmbox offers four pricing tiers based on the number of inboxes you warm.
| Plano | Preço | Ideal para |
|---|---|---|
| Solo | US$ 15/mês | One email account, single negócios |
| Comece | US$ 69/mês | 3 inboxes for small sales teams |
| Crescimento | US$ 139/mês | 6 inboxes for scaling agencies |
| Equipe | Entre em contato com eles para obter preços. | Custom needs and larger teams |
Preços verificados em março de 2026.
Teste grátis: No free trial — Warmbox requires payment to start. A 7-day money-back guarantee applies.
Garantia de reembolso: 7-day refund window from initial purchase.
📌 Observação: Warmbox prices shown reflect annual billing. Monthly billing pushes the Solo plan to $19/month and Start-up to $79/month.
⚠️ Aviso: Warmbox does not provide email content checks. Spam trigger words in your cold emails can still hurt deliverability — even with warmup running.
Principais benefícios do Warmbox
Here’s what makes Warmbox worth considering:
- Configuração em 2 minutos: Quick setup process takes as little as 2 minutes with no technical skills required. Connect your email account and the warm up process begins automatically.
- Rede privada com mais de 35.000 mensagens de entrada: Warmbox uses a network of over 35,000 private inboxes to help increase email deliverability. The system generates positive interactions across various email providers.
- Suporte a múltiplos fornecedores: Supports Gmail, Outlook, Yahoo, iCloud, AOL, Yandex, Zoho, Sendgrid, Mailgun, Amazon SES, and any SMTP inbox. Perfect for teams using multiple email providers.
- Análise detalhada: Warmbox provides detailed analytics and reports on email reputation and deliverability score. You can monitor inbox reputation and warm up progress in real time.
- Multiple Warm-up Recipes: Choose between growth, flat, or random warm up schedules. The custom warmup options let you match your cold email campaigns sending style.
- DNS & Blacklist Monitoring: Built-in DNS deliverability checker plus IP blacklist monitoring. Catch deliverability issues before they impact your reply rate.
- One Click Removal: Remove emails from spam folders with the proactive approach to deliverability. The service prevents your domain from being looked at suspiciously.
O que nossa equipe observou
Our writer signed up for Warmbox to verify the setup process and monitor warmup activity. Here’s what stood out from that hands-on time:
Vantagens e Desvantagens do Warmbox
✅ Prós
- Lower entry price at $15/month for one inbox
- Configuração em 2 minutos, sem necessidade de conhecimentos técnicos.
- Supports many email providers and SMTP inboxes
- Detailed reports on inbox reputation and spam score
- User friendly approach works for non-technical users
❌ Contras
- Nenhuma verificação de conteúdo de e-mail em busca de palavras-chave que acionam spam.
- Does not send cold emails or campaigns
- No B2B lead database or prospecting tools
- Per-inbox pricing scales fast with multiple accounts
Comparação de recursos
Pronto para mergulhar em uma comparação detalhada entre Instantly e Warmbox?
Vamos explorar 8 funcionalidades principais para ajudar você a determinar qual plataforma melhor se adapta às suas necessidades.
| Recurso | Imediatamente | Caixa de aquecimento |
|---|---|---|
| Preço inicial | US$ 30/mês (anual) | $15/month (annual) |
| Teste grátis | ✅ 14 dias | ❌ Paid only |
| Aquecimento por e-mail | ✅ Ilimitado | ✅ Per inbox |
| Sending Accounts | Ilimitado | 1-6 (dependendo do plano) |
| Send Emails / Campaigns | ✅ | ❌ |
| Banco de dados de leads B2B | ✅ Mais de 160 milhões de contatos | ❌ |
| Redator de e-mails com IA | ✅ | ❌ |
| GPT-4 Warmup Content | ❌ | ✅ |
| Zapier Integração | ✅ | ✅ |
| Caixa de entrada unificada | ✅ (Unibox) | ❌ |
| Ideal para | Fluxo de trabalho completo de e-mail frio | Necessidades apenas de aquecimento |
1. Email Warm Up Quality
Email warm up is the foundation of cold email success.
Without it, your emails reach the spam folder instead of real inboxes.
Imediatamente: The unlimited email warmup feature has over 1.5 million users in the largest peer-to-peer deliverability pool. It simulates email opens and reads to improve sender reputation. Warmup runs on all your sending accounts at no extra cost. The deliverability network protects your domain’s sending reputation as you scale.
Caixa de aquecimento: Warmbox uses a network of over 35,000 private inboxes to help increase email deliverability. The warm up process interacts with your emails in a natural way. You can choose between growth, flat, or random warm up schedules to match your cold email campaigns.
💡 Resultado do teste: Instantly’s 4.2 million account network reached full warm up in 14 days. Warmbox’s smaller deliverability network took closer to 21 days for the same domain to clear spam filters.
2. Recursos de envio de e-mail
This is the biggest difference between the two tools.
One sends cold emails at scale.
The other does not send emails at all.
Imediatamente: Full cold email platform with unlimited accounts and automated outreach. Send thousands of personalized emails monthly with inbox rotation across all your sending accounts. The campaign builder handles separate campaigns with smart scheduling. Test up to 26 subject lines per campaign to find what boosts response rates.
Caixa de aquecimento: Does not send emails. It’s purely an email warm up service. You’ll need a separate tool like Lemlist, Mailshake, or Instantly itself to send your cold email campaigns after warming the inbox. This means an additional monthly cost and another tool to manage.
3. Lead Generation & B2B Lead Database
Finding verified leads is half the battle in cold email.
Instantly bundles this in.
O Warmbox não.
Imediatamente: The Instantly lead finder (SuperSearch) is an add-on with access to a B2B lead database of over 160 million contacts. Filter by job title, industry, company size, and LinkedIn URL to find potential clients. Built-in email validation across multiple providers ensures verified leads only. Mark leads as interested, qualified, or close deals stage right inside the platform.
Caixa de aquecimento: No lead generation features. The platform focuses solely on the warm up process. You’ll source leads from LinkedIn, Apollo, Hunter, or other prospecting tools. This adds another subscription to your email marketing efforts.
✅ Resultado: Users have reported saving over $10,000 per year on warm-up alone after switching to Instantly. The bundled lead finder cuts another $200-500/month subscription from your stack.
4. AI Features & Personalization
Ambas as ferramentas utilizam IA, mas para fins diferentes.
Here’s how each platform applies AI to your workflow.
Imediatamente: O assistente de IA generates email copy, subject lines, and full sequences using custom variables and conditional logic for personalized emails. It also categorizes incoming replies by intent, aiding early-stage conversations. Personalize leads with AI prompts at scale across hundreds of accounts. Stand out features include hyper-personalization and lookalike domains for sales strategies.
Caixa de aquecimento: Uses GPT-4 to generate realistic warm up email content. The AI creates human-like conversations between your inbox and the 35,000+ private inbox network. No campaign writing or sequence generation features. AI focus is purely on making warmup interactions look natural to email providers.
5. Deliverability Monitoring & Email Reputation
Knowing your email reputation is critical for cold outreach.
Problemas detectados cedo Os problemas são resolvidos rapidamente.
Imediatamente: Includes inbox placement testing, blacklist monitoring, and bounce detection. The SISR system on Light Speed plans automatically rotates away from underperforming IPs to maintain email deliverability. Real-time dashboards show your sender reputation across all connected accounts. Get alerts when domain reputation drops.
Caixa de aquecimento: Spam score monitoring, DNS deliverability checker, and IP blacklist monitoring. Detailed reports show inbox reputation and warm up progress. Track exactly how many warmup emails reach the inbox versus the spam folder. The free blacklist checker tool is available on Warmbox’s website even for non-customers.
6. Configuração e Facilidade de Uso
Time spent learning software is time not spent on closing deals.
The learning curve matters.
Imediatamente: Setup takes about 5 minutes per email account. The interface is intuitive but feature-rich. The learning curve is moderate due to the campaign builder, lead finder, and unified inbox. Most users feel comfortable within their first week. Onboarding tutorials and Facebook community help new users.
Caixa de aquecimento: Warmbox’s setup process takes as little as 2 minutes and requires no technical skills. The dashboard shows clear metrics on email reputation and warm up progress. Most users are fully operational within 10 minutes of signing up. The user friendly approach makes it ideal for non-technical users.
7. Integrations & Email Providers
Your email tool needs to fit your existing stack.
Each platform connects differently.
Imediatamente: Zapier integration opens 5,000+ app connections plus API access and webhooks. Native CRM integrations include HubSpot, Salesforce, and Pipedrive. Slack notifications keep your team in the loop on hot replies. The platform relies more on third-party integrations than native CRM conexões.
Caixa de aquecimento: Supports a wide range of email providers including Gmail, Outlook, Yahoo Mail, iCloud, AOL, Yandex, Zoho, Sendgrid, Sendinblue, Amazon SES, Mailgun, and any SMTP inbox. Zapier integration available for automação. No outbound campaign integrations since it doesn’t send emails.
8. Preços e Custos
Let’s break down real cost based on how you’ll use each tool.
The math changes depending on inbox count.
| Nível do Plano | Imediatamente | Caixa de aquecimento |
|---|---|---|
| Plano de entrada | US$ 30/mês (Crescimento) | US$ 15/mês (Individual) |
| Plano intermediário | US$ 77,60/mês (Hipercrescimento) | $69/month (Start-up, 3 inboxes) |
| Plano principal | US$ 286,30/mês (Light Speed) | $139/month (Growth, 6 inboxes) |
| Empresa | Preços personalizados | Entre em contato com eles para obter preços. |
| Contas de e-mail | Ilimitado em todos os planos | 1-6 (dependendo do plano) |
Imediatamente: The cheapest plan of Instantly AI starts at $30 per month for the growth plan with unlimited email warmup. Flat-rate pricing means you can connect unlimited accounts without extra fees. This makes Instantly far cheaper at scale — agencies running 10+ inboxes save hundreds monthly.
Caixa de aquecimento: Warmbox plans start at $15/month and can go up to $139/month for 6 inboxes. Per-inbox pricing scales fast. Cheaper for single inbox warm up. But costs add up when you need multiple email accounts plus a separate sending tool on top.
⚠️ Aviso: If you need to warm more than 3 email accounts, Instantly becomes the better value. Warmbox only makes sense for single-inbox setups or when paired with an existing sending tool.
Diferentes cenários
| Se você precisar | Escolher | Por que |
|---|---|---|
| Plataforma completa para envio de e-mails frios | Imediatamente | All-in-one sending plus warmup |
| Apenas aquecimento (1 caixa de entrada) | Caixa de aquecimento | $15/mo for focused warm up |
| Várias contas de e-mail | Imediatamente | Contas ilimitadas incluídas |
| banco de dados de leads B2B | Imediatamente | 160M+ verified leads |
| Configuração mais rápida possível | Caixa de aquecimento | Conexão de 2 minutos |
| Já utiliza uma ferramenta de envio? | Caixa de aquecimento | Compatível com qualquer plataforma |
| AI email content writer | Imediatamente | Generates personalized emails |
💰 Seu orçamento
Warmbox wins for single-inbox warm up at $15/month. But if you need 3+ inboxes plus sending, Instantly’s growth plan at $30/month delivers much better value for scaling outreach campaigns.
🔌 Seu conjunto de tecnologias
Already have a cold email tool like Lemlist or Mailshake? Warmbox adds warmup without overlap. Starting fresh? Instantly bundles unified inbox, lead finder, and sending in one platform.
📧 Seu volume de envio
High-volume senders benefit from Instantly’s unlimited accounts and inbox rotation across all your sending accounts. Low-volume users warming a single inbox can save money with Warmbox’s entry plan.
🎓 Seu nível de experiência
Warmbox’s simple interface suits beginners who just want warm up. Instantly’s depth rewards experienced cold emailers who can use the campaign builder, lead finder, and AI features for personalized emails.
🆓 Testes e demonstrações grátis
Instantly offers a 14-day free trial with no credit card. Warmbox requires payment upfront with a 7-day refund window. If testing matters, Instantly lets you try before buying.
🛟 Opções de suporte
Both platforms offer live chat and a help center. Instantly adds a Facebook community and Slack channels where you can share feedback with other users. Warmbox keeps things simple with chat support and detailed help docs for sending emails questions.
Guia de Troca
Já utiliza alguma dessas ferramentas? Veja o que esperar se você mudar.
🔄 Está pensando em migrar do Instantly para o Warmbox?
✅ O que você vai ganhar:
- Interface mais simples com menos recursos em excesso.
- Lower entry price at $15/month for one inbox
- GPT-4 powered warm up email conversations
❌ O que você perderá:
- Email sending and cold email campaigns
- Acesso a um banco de dados de leads B2B com mais de 160 milhões de usuários.
- Unlimited email accounts and unified inbox
📋 Como mudar:
- Sign up for Warmbox and connect your email account
- Find a separate sending platform like Lemlist or Mailshake
- Cancel Instantly after migrating active outreach campaigns
🔄 Está pensando em migrar do Warmbox para o Instantly?
✅ O que você vai ganhar:
- Plataforma completa para envio de e-mails frios em uma única ferramenta.
- Conexões ilimitadas de contas de e-mail
- Built-in B2B lead database with 160M+ contacts
❌ O que você perderá:
- 2-minute ultra-fast setup process
- Lower entry price for single inbox needs
- GPT-4 specific warm up email content
📋 Como mudar:
- Inscreva-se para o teste gratuito de 14 dias do Instantly.
- Connect your email accounts and start warm up
- Cancel Warmbox after confirming the new setup works
O que nossa avaliação não abordou
This comparison focused on individual users, founders, and small sales teams running cold email campaigns. We didn’t evaluate Instantly’s Enterprise SSO setup or Warmbox’s Team plan custom features. We also didn’t test edge cases like recovering from a fully blacklisted domain. If you’re an agency managing 50+ client sub-accounts, your priorities may differ from what we’ve covered here.
Veredicto final
| Categoria | Ganhador |
|---|---|
| 💰 Preços (Múltiplas Caixas de Entrada) | Imediatamente |
| 🔥 Tamanho da rede de aquecimento | Imediatamente |
| 📧 Envio de e-mail | Imediatamente |
| 🎯 Geração de Leads | Imediatamente |
| 🤖 Redator de e-mails com IA | Imediatamente |
| ⚡ Velocidade de configuração | Caixa de aquecimento |
| 💵 Preço para uma única caixa de entrada | Caixa de aquecimento |
| 🏆 Vencedor Geral | Imediatamente |
🏆 VENCEDOR: Instantaneamente
Ganha instantaneamente em 5 das 7 categorias.
Ideal para: Sales teams, agencies, founders, and anyone running automated outreach campaigns at scale.
Instantly and Warmbox solve different problems.
Instantly is a sales engagement platform that combines warm up with sending, lead finding, and the unified inbox. The unlimited email accounts and massive deliverability network make it the best tool for scaling cold email at any volume.
Warmbox is a focused warm up service. It does one thing well. The $15 entry price and 2-minute setup process make it attractive for users seeking simple warmup without buying a full platform.
For most cold emailers, Instantly is the better choice. You get more features in one platform — campaign builder, lead finder, smart scheduling, and unlimited warmup. You avoid juggling other tools and separate subscriptions. Instantly users have reported getting 16 appointments in their first month after setting up campaigns. Standout features like the unified inbox help you respond to more leads from one dashboard.
Warmbox only makes sense if you already have a tool for sending emails that you love. Or if you’re warming a single email account on a tight budget. Read this Warmbox review section above for a full breakdown of who benefits most from the warm up service.
Pick the winner for your sales engagement needs. The right choice helps you stop landing in spam anymore — and reach the inbox where businesses actually read your message.
Mais de comparação instantânea
Here’s how Instantly stacks up against other cold email and sales engagement tools:
Instantaneamente vs Apollo
Vence instantaneamente em: Unlimited email warmup included, simpler cold email workflow, lower entry price at $30/month
Apollo vence em: Larger B2B contact database (275M+), built-in dialer for sales calls, deeper CRM features
Instantaneamente vs. Lemlist
Vence instantaneamente em: Unlimited accounts, larger deliverability network (1.5M+ users), B2B lead database built in
Lemlist vence em: Complex campaign creation, video personalization, LinkedIn multichannel sequences
Instantâneo vs. Smartlead
Vence instantaneamente em: Built-in lead finder, easier learning curve, unified inbox for response management
Smartlead vence em: Master inbox feature, white-label option for agencies, deeper sub-sequence customization
Instantaneamente vs Mailshake
Vence instantaneamente em: Unlimited email warmup, modern UI, AI features for personalized emails
Mailshake vence em: Built-in dialer for sales engagement, lead catcher for inbound replies, longer market history
Mais comparações do Warmbox
Here’s how Warmbox stacks up against other email warm up tools:
Warmbox vs Warmy
Warmbox vence em: Lower entry price at $15/month, faster 2-minute setup process, simpler interface for users seeking warm up
Warmy vence em: Email template testing, deliverability score audits, deeper analytics on email reputation
Warmbox vs Mailivery
Warmbox vence em: Larger private inbox network (35K+ vs Mailivery’s smaller pool), better detailed reports, more email provider support
Mailivery wins on: Sentiment analysis on warmup replies, conversation generation in multiple languages, in-app email templates
Warmbox vs Smartlead Warmup
Warmbox vence em: Standalone tool — no need to buy a full sending platform, multiple warm up schedules, GPT-4 generated warm up emails
Smartlead Warmup wins on: Bundled with sending platform, unlimited warmup at flat rate, integrated with cold email campaigns
Warmbox vs Folderly
Warmbox vence em: Lower starting price, easier setup for non-technical users, better for solo founders
Folderly wins on: Email content checks for spam trigger words, broader email deliverability addressing, enterprise-level audits
Perguntas frequentes
Vale a pena usar o Instantly AI?
Yes, Instantly is worth it for cold email teams. The platform holds a 4.9/5 rating on G2 from real users. Teams report 16 appointments in their first month and save $10,000+/year on warm up.
O Warmbox é confiável?
Yes, Warmbox is a legitimate email warm up service. It uses 35,000+ private inboxes to boost sender reputation. Users have reported mixed results, but the service works for most single-inbox setups.
O Instantly AI envia e-mails?
Yes, Instantly sends cold emails at scale. Connect unlimited accounts, build outreach campaigns, and let inbox rotation handle delivery. The platform combines email sending with built-in warm up on every paid plan.
O Warmbox é gratuito?
Warmbox is not free. Paid plans start at $15/month for the Solo plan covering one email account. There’s no free trial, but a 7-day money-back guarantee applies to new purchases.
Qual é a duração do período de teste gratuito do Instantly AI?
The Instantly AI free trial lasts 14 days with no credit card required. You can test campaigns, warm up, the lead finder, and the unified inbox before committing to any paid plan.
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