# What pairs well with GlockApps > GlockApps is a deliverability tool, and a team running it still has 8 neighbouring categories to staff. The pick in each is Smartlead for cold email outreach, Maildoso for cold email infrastructure, MillionVerifier for email verification, Sender for email service providers, Outplay for sales engagement, Regie.ai for AI SDR agents, Zoho CRM for sales CRM and Umami for GTM analytics, each the leading tool in that category on published criteria. - Profile: https://saastracker.org/products/glockapps - Category: Email Deliverability & Warming (https://saastracker.org/categories/email-deliverability) - Web version: https://saastracker.org/products/glockapps/stack ## The stack, category by category | Category | Ideal pairing | Because | Benefit | | --- | --- | --- | --- | | Cold Email Outreach | [Smartlead](https://saastracker.org/products/smartlead) (Best Value) | GlockApps is built for deliverability, not cold email. Smartlead adds aggressive volume pricing at Pro tier and above. | Outreach goes out on a schedule and replies land in one place instead of a personal inbox. | | Cold Email Infrastructure | [Maildoso](https://saastracker.org/products/maildoso) (Best Value) | GlockApps is built for deliverability, not infrastructure. Maildoso adds a thirty-day money-back guarantee. | Sending moves off the main domain, so a burned domain costs a spare rather than the company's email. | | Email Verification | [MillionVerifier](https://saastracker.org/products/millionverifier) (Best Value) | GlockApps sends buyers elsewhere for a single quick spam check. MillionVerifier adds charges nothing for risky results, including unresolved catch-alls. | Dead addresses come off the list before the send, so the bounce rate never touches the domain. | | Email Service Providers | [Sender](https://saastracker.org/products/sender) (Best Value) | GlockApps is built for deliverability, not ESPs. Sender adds most generous free tier in the category. | An opt-in audience is owned rather than rented, and reaching it costs nothing per send. | | Sales Engagement | [Outplay](https://saastracker.org/products/outplay) (Best Value) | GlockApps is built for deliverability, not engagement. Outplay adds a genuinely usable free-forever tier plus a $39 entry plan. | One cadence covers email, calls and LinkedIn, so nobody drops a follow-up between tools. | | AI SDR Agents | [Regie.ai](https://saastracker.org/products/regie-ai) (Best Value) | GlockApps is built for deliverability, not AI SDR. Regie.ai adds sending from your own Gmail or Outlook. | Research, writing and sending happen without a headcount, and the meetings still get booked. | | Sales CRM | [Zoho CRM](https://saastracker.org/products/zoho-crm) (Best Value) | GlockApps is built for deliverability, not CRM. Zoho CRM adds a free 3-user edition. | Every conversation ends up on a record, so a rep leaving does not take the pipeline with them. | | GTM Analytics | [Umami](https://saastracker.org/products/umami) (Best Value) | GlockApps lists seed tests measure a fixed panel of test inboxes among its limits. Umami adds a free Cloud tier at roughly 100,000 events a month with three. | Spend gets attributed to revenue, so the channel that works is the one that gets funded. | ### Smartlead for Cold Email Outreach GlockApps is built for deliverability, not cold email. Smartlead adds aggressive volume pricing at Pro tier and above. Outreach goes out on a schedule and replies land in one place instead of a personal inbox. Sub-sequences bring behavioral branching most cold tools lack. Instantly holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### Maildoso for Cold Email Infrastructure GlockApps is built for deliverability, not infrastructure. Maildoso adds a thirty-day money-back guarantee. Sending moves off the main domain, so a burned domain costs a spare rather than the company's email. Automated SPF, DKIM, and DMARC with setup quoted at under ten minutes and a broad TLD list for building varied secondary domain pools. InboxKit holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### MillionVerifier for Email Verification GlockApps sends buyers elsewhere for a single quick spam check. MillionVerifier adds charges nothing for risky results, including unresolved catch-alls. Dead addresses come off the list before the send, so the bounce rate never touches the domain. A plainly worded money-back guarantee: exceed 4 percent hard bounce after cleaning and the last payment is refunded, with the vendor explicitly claiming no small print. ZeroBounce holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### Sender for Email Service Providers GlockApps is built for deliverability, not ESPs. Sender adds most generous free tier in the category. An opt-in audience is owned rather than rented, and reaching it costs nothing per send. Dedicated IP access from the Professional tier on request, which is far lower down the ladder than most platforms gate it. Mailchimp holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### Outplay for Sales Engagement GlockApps is built for deliverability, not engagement. Outplay adds a genuinely usable free-forever tier plus a $39 entry plan. One cadence covers email, calls and LinkedIn, so nobody drops a follow-up between tools. Enterprise trimmings at $139/user undercut the platforms it imitates. Reply.io holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### Regie.ai for AI SDR Agents GlockApps is built for deliverability, not AI SDR. Regie.ai adds sending from your own Gmail or Outlook. Research, writing and sending happen without a headcount, and the meetings still get booked. The only serious AI SDR platform with a genuinely free tier and a published $49 self-serve plan, which removes the category's usual $2,500 evaluation tax. AiSDR holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### Zoho CRM for Sales CRM GlockApps is built for deliverability, not CRM. Zoho CRM adds a free 3-user edition. Every conversation ends up on a record, so a rep leaving does not take the pipeline with them. Unmatched capability per dollar: custom modules from $14, Blueprint process enforcement and unlimited reports from $23, approvals and sandboxes from $40. HubSpot CRM holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ### Umami for GTM Analytics GlockApps lists seed tests measure a fixed panel of test inboxes among its limits. Umami adds a free Cloud tier at roughly 100,000 events a month with three. Spend gets attributed to revenue, so the channel that works is the one that gets funded. Retention analysis and user journeys are unusual in privacy-first web analytics and push Umami toward lightweight product analytics without the cookies. Google Analytics 4 holds Category Leader here, and is worth weighing if that is closer to the problem GlockApps leaves open. ## FAQ ### What is the best stack to run with GlockApps? GlockApps is a deliverability tool, and a team running it still has 8 neighbouring categories to staff. The pick in each is Smartlead for cold email outreach, Maildoso for cold email infrastructure, MillionVerifier for email verification, Sender for email service providers, Outplay for sales engagement, Regie.ai for AI SDR agents, Zoho CRM for sales CRM and Umami for GTM analytics, each the leading tool in that category on published criteria. ### What do I pair with GlockApps for Cold Email Outreach? Smartlead. GlockApps is built for deliverability, not cold email. Smartlead adds aggressive volume pricing at Pro tier and above. Outreach goes out on a schedule and replies land in one place instead of a personal inbox. ### How many tools do I need alongside GlockApps? GlockApps sits next to 8 other categories in a working deliverability stack, and its own profile names the gap each one fills. Most teams staff the first two or three and add the rest as the motion grows. ### Is Umami worth adding alongside GlockApps? GlockApps lists seed tests measure a fixed panel of test inboxes among its limits. Umami adds a free Cloud tier at roughly 100,000 events a month with three. Spend gets attributed to revenue, so the channel that works is the one that gets funded. --- Source: SaaSTracker (https://saastracker.org), an independent editorial project. Pairings are the leading tool in each complementary category, chosen on published criteria: https://saastracker.org/methodology. Placement cannot be purchased.