Bulk Email Boxer vs Instantly, pricing, features, and when each one wins
May 1, 2026 · Bulk Email Boxer Team · 4 min read
Instantly is the best-known cold email tool in the market, with around 20,000 active customers as of 2026 and a $97/month Hypergrowth tier that's become a de-facto industry pricing anchor.
We built Bulk Email Boxer because we kept hearing the same three complaints from Instantly customers: too expensive at scale, deliverability cliffs after a few hundred emails per day, and per-mailbox add-on fees that compound. Here's the head-to-head.
Pricing
Bulk Email Boxer pricing: $47 / $97 / $358 monthly, with grants covering up to 10,000 / 250,000 / 1,000,000 campaign sends when used entirely for sending. Sending, verification and Lead Finder share those credits; the capacities are alternative uses, not extra benefits. One-time verification packs are $30 / $60 / $80 for 6,000 / 12,000 / 16,000 checks, and lead packs are $30 / $69 / $79 for 3,000 / 6,900 / 7,900 delivered leads. Custom orders are available.
| Plan size | Bulk Email Boxer | Instantly |
|---|---|---|
| Entry tier | $47/mo (10,000 campaign emails) | $47/mo (Growth) |
| Mid-volume | $97/mo (250,000 campaign emails) | $97/mo (Hypergrowth) |
| High-volume | $358/mo (1,000,000 campaign emails) | $358/mo (Light Speed) |
| Per-mailbox add-on fee | $0 | $0-$8 per inbox at scale |
| Mailbox ramp | Optional 15-day ramp | Warmup offering varies by plan |
The monthly sending prices match Instantly's published $47/$97/$358 tiers. When all included credits are used for campaign sending, Bulk Email Boxer targets 10,000/250,000/1,000,000 emails. Using the shared credits for verification or lead discovery reduces the remaining sending quantity. Mailbox safety limits still apply. Instantly's public Hypergrowth figures differ across pages (100,000 versus 125,000); the 250,000 target uses its help-centre figure.
Each paid Bulk Email Boxer tier supports unlimited connected mailboxes. The per-mailbox 15-day campaign-send ramp is included but off by default.
Sending architecture
Instantly lets you connect mailboxes (Gmail / Outlook / private SMTP), but its core inbox-placement engine is heavily reliant on the Instantly-hosted DFY (Done-For-You) domains and shared sending infrastructure. When that infrastructure has a bad week, every customer sees deliverability dip.
Bulk Email Boxer is mailbox-only. You connect your own Gmail/Workspace/Outlook/SMTP via app-password. We never touch your DNS and we don't have shared IPs. Your reputation, your domain, your control, and our outage doesn't co-tank your inbox rate.
Warmup
The products expose different warmup models.
- Instantly caps warmup volume by tier and charges $20-30/mo for additional inboxes beyond a few.
- Bulk Email Boxer applies a 15-day per-mailbox cap to real campaign sends. The ramp is optional when you add a sender and you can toggle it off; there is no background warmup pool.
For an outbound team with 8-15 mailboxes, this difference is $200-400/mo.
Deliverability features (RFC 8058 / List-Unsubscribe)
As of February 2024, Gmail and Yahoo enforce one-click unsubscribe via
the List-Unsubscribe-Post: List-Unsubscribe=One-Click header for
senders >5,000/day. Both Bulk Email Boxer and Instantly stamp this
correctly today.
If you're under the threshold, the body-link unsubscribe is enough - both tools include this too.
For the full deliverability checklist, see our 2026 cold email checklist.
Sequencing and A/B testing
Both support multi-step sequences and reply-detection auto-stop. Bulk Email Boxer offers A/B variants on Growth and Scale.
- Instantly's sequence editor is more polished, they've shipped longer.
- Bulk Email Boxer's editor supports spintax, variable injection, and open/click conditions when a custom tracking domain is verified. Replies stop a sequence rather than choosing a reply branch.
Where Instantly still wins
- Lead database / B2B contact finder. Instantly bundles a leads DB on higher tiers. Bulk Email Boxer is designed for teams that bring their own list and verify it before sending, rather than reselling a private Apollo-style B2B database.
- Brand recognition. Bigger brand → easier to convince a conservative VP-of-Sales to sign off. We're newer.
- Integrations marketplace. Instantly has more native Zapier / HubSpot / Pipedrive integrations. We have a webhook system you can point at any of them, but it's bring-your-own-glue.
Where Bulk Email Boxer wins
- $47 entry tier with an optional 15-day mailbox ramp
- Same monthly price, double the volume, e.g. $358/mo buys 1M emails vs Instantly's $358 Light Speed
- Unlimited mailboxes always, no per-inbox tax
- real mailbox-only architecture, your reputation, not ours
- GDPR self-serve delete-my-data flow built-in (some EU teams require this)
Verdict
If you're already on Instantly and happy: stay. The cost of switching warmup state isn't worth a few dollars saved.
If you're choosing fresh, or scaling up and watching the volume caps on Instantly's tiers, Bulk Email Boxer undercuts the price and roughly doubles the volume at every tier. Bulk Email Boxer adds an on-by-default, toggleable 15-day sending ramp and RFC 8058 headers, with no per-mailbox tax.