Built-in lead data vs. a cleaner sequencer with multichannel reach.
Autoklose and Mailshake are both tools for running cold email sequences, but they approach the problem differently. Autoklose bundles a B2B contact database of 35 million-plus verified contacts with its sequencing tool, giving teams a single platform to find leads and reach out. Mailshake is a dedicated sales engagement platform focused on deliverability, multichannel sequences (email, phone, and social), and a clean rep workflow. The database-versus-pure-sequencer distinction matters most when deciding whether to consolidate lead generation and outreach in one tool or keep separate systems with better specialization in each.
Built-in lead database vs. bring-your-own-list
Autoklose includes access to a database of 35 million-plus B2B contacts filterable by industry, title, company size, location, and technology used. You can prospect directly inside the tool without exporting to a spreadsheet first. This is genuinely useful for small teams without a dedicated data stack. The trade-off: Autoklose's database is a tier below Apollo, ZoomInfo, or Clay for data quality and enrichment depth. Mailshake does not include a contact database. You import your own list from a CRM, data provider, or spreadsheet. For teams already using Apollo, ZoomInfo, or Clay for list building, Mailshake's pure-sequencer approach avoids paying for database access you are already covering elsewhere.
Multichannel sequencing and phone steps
Mailshake supports email, phone call tasks, and social touchpoints (LinkedIn, Twitter) in a single sequence. Its SHAKEspeak VoIP feature lets reps make calls directly from the platform on the Sales Engagement plan. Autoklose is primarily email-focused. It handles email sequences well, with personalization tokens, A/B testing, and reply detection, but its phone and social steps are less developed. If your sequence needs to include a LinkedIn connection request on day three and a call attempt on day five, Mailshake handles that workflow more cleanly than Autoklose.
Pricing and what you actually get at each tier
Autoklose Starter is $59.99/user/month and includes the contact database, unlimited email campaigns, and basic analytics. Mailshake's Starter plan is $58/user/month for email-only sequences. The Sales Engagement plan at $83/user/month adds phone, social, and team features. Both tools are in a similar price band, but Autoklose includes database access while Mailshake includes phone and social channel support. Your team's primary gap — data vs. channels — determines which is the better value at the same rough price point.
| Autoklose | Mailshake | |
|---|---|---|
| Built-in lead database | Yes, 35M+ verified B2B contacts filterable by title, industry, company size | No; import-only (CSV, CRM, or API) |
| Email sequences | Yes, with personalization tokens, A/B testing, reply detection | Yes, with A/B testing, automated follow-ups, link tracking |
| Phone steps in sequences | Basic call task reminders (no native VoIP dialer) | Yes, native VoIP via SHAKEspeak (Sales Engagement plan, $83/user/month) |
| LinkedIn and social steps | Manual task reminders only | Yes, LinkedIn and Twitter social task steps built into sequences |
| Starting price | $59.99/user/month (includes database access) | $58/user/month (email only); $83/user/month (all channels) |
| Deliverability tools | Deliverability score, warm-up via third-party integration | Mailshake Warm-Up (native), spam checker, deliverability reports |
| CRM integrations | HubSpot, Salesforce, Pipedrive, Zoho (native and Zapier) | HubSpot, Salesforce, Pipedrive, Close, Copper (native integrations) |
| Team reporting | Campaign analytics, team dashboards on Business plan and above | Team-level reporting included on Sales Engagement plan |
| Best for | Small teams wanting list building and sequencing in one tool | Teams with their own data source needing clean multichannel sequences |
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The verdict
If you are a 1-5 person team without a separate data source, Autoklose's all-in-one approach saves you from managing multiple tools. The built-in database, while not Apollo-level quality, is good enough to run initial campaigns across most B2B personas. If you already have Apollo, ZoomInfo, or Clay for data, Autoklose's database is a feature you are paying for but not using. In that case, Mailshake's cleaner sequencer with phone and social channel support is the better fit. The multichannel capability matters most for teams running outbound with a human touch: a well-timed phone call or LinkedIn connection request after initial email contact meaningfully improves conversion rates. Mailshake handles that workflow better. For deliverability-focused teams, Mailshake also has an edge with more native warm-up tooling and documentation. Both tools work well for teams under 20 reps. Neither has the sophistication of Outreach or SalesLoft at enterprise scale.
How good is Autoklose's built-in contact database?
Better than nothing; not best-in-class. Autoklose's database of 35 million contacts is sufficient for finding initial prospect lists across standard B2B personas. Email accuracy is generally adequate (they report 95%+ deliverability on their database contacts), but enrichment depth is limited compared to Apollo, ZoomInfo, or Clay. You will not get job change signals, technographic data, or LinkedIn URL depth from Autoklose's database. For a team bootstrapping outbound without a data budget, it is a reasonable starting point. For teams serious about signal-based prospecting or highly targeted campaigns, supplement with a primary data source.
Does Mailshake have email warm-up built in?
Yes. Mailshake includes Mailshake Warm-Up, which automatically sends and receives low-volume emails from your connected mailbox to build sending reputation before cold campaigns. It also includes a spam checker that previews how your emails will score against major spam filters before sending. For teams setting up new domains for cold outreach, the built-in warm-up is a meaningful convenience, though dedicated warm-up tools like Lemwarm or Instantly's warm-up feature often provide more detailed reporting and control.
Can Autoklose or Mailshake handle sequences with 10 or more steps?
Both can. Autoklose supports multi-step sequences with conditional branching based on whether a prospect opened an email, replied, or clicked a link. Mailshake sequences can include unlimited steps across email, phone, and social, with delays and conditions between each. For most cold outreach use cases, a 5-8 touch sequence is the practical limit before response rates approach zero; the technical limits of either tool are not the constraint. Where Mailshake has an edge is in multichannel step mixing — combining email, call, and LinkedIn tasks in a single flow — which Autoklose handles less cleanly.
What is the best alternative to both Autoklose and Mailshake?
Instantly is the most commonly recommended alternative for pure cold email volume at competitive pricing. It handles high-sending-volume campaigns with strong deliverability tooling and unlimited sending accounts on all plans, starting at $37/month. For teams wanting a database plus sequences in one tool (similar to Autoklose), Apollo ($99/user/month for basic) combines data and sequencing with significantly better data quality. For teams wanting the multichannel approach at larger scale, Outreach and SalesLoft are the enterprise options, though at higher price points and onboarding complexity.
How does Mailshake's SHAKEspeak VoIP compare to dedicated dialers?
SHAKEspeak is functional but not a replacement for a dedicated dialer. It handles basic VoIP calling and call logging from within a sequence, which covers teams that want to add occasional phone touches without buying a separate tool. It does not have local presence dialing, power dialing queues, or the call coaching features you get from Kixie, Close, or Nooks. For teams where phone is a primary outbound channel, SHAKEspeak is a convenience add-on. The decision point: if call steps in your sequence are task reminders (any sequencer handles that), you do not need SHAKEspeak. If you need live VoIP dialing with call analytics and local presence, a dedicated sales dialer is the right tool.
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