Last verified: August 12, 2026
Cold email lives or dies on deliverability, and the three tools here solve for it in different ways: one is a volume-first sending engine, one is a multichannel sequencer, and one hands you the infrastructure already built. We ranked them by overall fit, with honest notes on where the sticker price doesn't cover the whole stack.
ToolsGavel's top pick: Instantly (4.2/5, from $37.60/mo) — Unlimited sending accounts and warmup on every paid tier, so you scale by adding inboxes instead of upgrading seats. The B2B lead database bills separately, and 2026 testing found real inbox placement well below the dashboard's warmup score.
Independent review. If you buy through links on this page we may earn a commission, at no extra cost to you. It never changes our scores — how we test.
| # | Tool | Score | Advertised price | Real $/mo, billed annually | Month-to-month premium |
|---|---|---|---|---|---|
| #1 | Instantly — Best for volume | 4.2/5 | $47/mo (Growth, billed monthly) | $37.6/mo | +25% |
| #2 | lemlist — Best multichannel | 4.1/5 | $69/user/mo (Email, billed monthly) | $55/mo | +25% |
| #3 | ScaledMail — Best done-for-you infrastructure | 3.7/5 | $3.50/mailbox/mo | — | — |
Audited prices verified against live vendor pricing pages — full dataset in the Pricing Gap Index.
Unlimited sending accounts and warmup on every paid tier, so you scale by adding inboxes instead of upgrading seats. The B2B lead database bills separately, and 2026 testing found real inbox placement well below the dashboard's warmup score.
Best for: Outbound teams sending high volumes of cold email who want unlimited sending accounts and built-in warmup, not a full sales CRM · from $37.60/mo
Email, LinkedIn, SMS, and calls run from one sequence builder, with personalization that goes past a mail-merge field. Pricing is per seat with capped sending addresses, so cost climbs as you add reps and mailboxes.
Best for: Outbound reps and small sales teams running multichannel cadences (email plus LinkedIn plus a personal touch) who want warmup and a lead database in the same account, not just high-volume email · from $55/user/mo billed annually, or $69/user/mo billed monthly
A managed layer for teams that want inbox and domain setup handled rather than built in-house. Fits outbound programs that want sending capacity online fast without running warmup and deliverability tooling themselves.
Best for: Outbound teams and agencies past the DIY stage who want domains, DNS and inboxes bought, configured and maintained for them, then handed off to whatever sender they already run · from $3.50/mailbox/mo
These three answer three different questions.
Instantly answers “I need volume, and I don’t want mailbox count to cap me.” Every paid tier bundles unlimited sending accounts and unlimited warmup, so a team running 30 inboxes pays the same as one running five, a real edge over tools that charge per seat or per mailbox. The catch: the B2B lead database is a separate subscription on top of the sending plan, and a 2026 hands-on deliverability test found real inbox placement well below what the dashboard’s warmup score suggested. Check your own placement numbers rather than trusting the score.
lemlist answers “I need email, LinkedIn, and a personal touch in the same cadence.” The Multichannel plan runs email, LinkedIn steps, SMS, WhatsApp, and an in-app dialer from one sequence builder, and the personalization goes past mail-merge, with dynamic images and short per-contact videos included. Sending addresses are capped at five per seat on that plan, so a team spreading volume across dozens of mailboxes pays more as headcount and inbox count grow.
ScaledMail answers “I don’t want to run warmup and domain rotation myself.” It operates as a done-for-you layer, with inboxes, domains, and deliverability setup handled on your behalf instead of configured by your own team. That trades some hands-on control for speed, which suits an outbound program that needs sending capacity live fast and doesn’t have someone dedicated to babysitting domain reputation.
Deliverability is the real battleground here, not the feature list. Instantly wins on raw send volume: unlimited mailboxes per tier beats per-seat pricing once inbox count is the constraint, but budget for the lead database as a second line item and verify placement yourself instead of trusting the warmup score. Pick lemlist if your outbound motion mixes channels and personalization carries as much weight as volume. Pick ScaledMail if you’d rather pay someone else to build and maintain sending infrastructure than run warmup and domain setup in-house. Full pricing caveats are in each review.
