Infraforge vs Instantly (2026): Dedicated IPs vs All-in-One Sender

Short version: Infraforge is a dedicated-IP mailbox infrastructure product. Instantly is a cold email sequencer platform that offers email accounts as a shared-infrastructure add-on. Like Mailforge vs Instantly, this isn't an apples-to-apples comparison. It's an infrastructure-vs-sender question. The right answer for most buyers is to use both.

If you just need a sender with bundled mailboxes that works tomorrow, buy Instantly. If you already have a sender and you need real dedicated-IP infrastructure that won't get torched by a noisy shared-IP neighbor, buy Infraforge. If you're scaling past 100 mailboxes and noisy-neighbor risk keeps you up at night, Instantly's SISR tier ($358/mo Light Speed) is their answer to the dedicated-IP question, but you're paying $358 for the sequencer plus per-mailbox account fees on top.

	Infraforge	Instantly
Category	Dedicated-IP mailbox infrastructure	Cold email sender platform
IP type	Dedicated per customer	Shared pool (SISR on Light Speed)
Pricing	$3-$4/mailbox/month	$47-$358/mo software + account fees
Mailbox type	Bring your own sending software	Real Google Workspace add-on
Microsoft 365	Not listed (cross-sells to Primeforge)	Not available
Warmup	Warmforge separate	Unlimited, bundled
Sequencer	Bring your own	Bundled
Lead database	None	450M+ B2B leads
200-mailbox benchmark	$651/mo (Infraforge)	Highly variable (account add-on pricing)
Best for	Agencies needing dedicated IPs	Solo operators wanting all-in-one

Infraforge is the dedicated-IP product inside the Salesforge Forge Stack. The same company ships Mailforge (shared-IP SMTP, cheaper), Primeforge (real Google/Microsoft accounts), and Warmforge (warmup). Infraforge's job in that stack is to provision dedicated IPs for teams that need IP isolation: agencies running high-volume campaigns, teams worried about noisy shared-IP neighbors, and any operator whose domain reputation is too valuable to mix into a shared pool.

What Infraforge ships (from the homepage):

• Dedicated IPs per customer (the core differentiator vs Mailforge)
• Unlimited domains and mailboxes
• Automated DNS setup (SPF, DKIM, DMARC, custom domain tracking)
• Bulk DNS updates
• Pre-warmed domains and mailboxes option
• Multiple workspaces
• SSL & domain masking (add-on)
• Multi-IP provisioning (add extra IPs for security)
• Masterbox (unified inbox across all mailboxes in a workspace)
• Sender rotation and smart sending limits built in
• API access
• 5-minute claimed setup time
• Works with Salesforge and any other sending software (no numeric integration count)

What Infraforge does not ship:

• A sequencer, CRM, or unified outbound platform (you bring your own or use Salesforge)
• Real Google Workspace or Microsoft 365 provider accounts (Primeforge ships those)
• Any lead database
• Ongoing blacklist monitoring as a distinct product feature
• Azure mailboxes

Infraforge pricing (verified from the homepage): '$4 to $3 per mailbox per month.' The homepage comparison table shows $651/month for 200 mailboxes on Infraforge vs $1,680/mo for Google Workspace direct and $1,200/mo for Microsoft 365 direct. $651 divided by 200 mailboxes is $3.26/mailbox effective at the 200-mailbox benchmark volume, which is consistent with the homepage $3-$4 band.

Infraforge's positioning is 'dedicated IP without the Google Workspace/M365 price premium.' You don't get real provider accounts. You get dedicated-IP SMTP infrastructure designed specifically for cold outreach, which Infraforge argues is more deliverability-optimized than either Gmail or Outlook.

Instantly is a cold email outreach platform. Already well-covered in our Mailforge vs Instantly comparison, so here's the short version:

Verified Instantly pricing (from instantly.ai/pricing):

• Growth: $47/mo: unlimited email accounts + unlimited warmup, 1,000 contacts, 5,000 emails/mo
• Hypergrowth: $97/mo: same plus 25,000 contacts, 100,000 emails/mo
• Light Speed: $358/mo: 100,000+ contacts, 500,000+ emails/mo, SISR (Server and IP Sharding and Rotation) system
• Instantly Credits (lead DB add-on): $47/mo Growth tier = 1,500-2,000 credits + 450M+ B2B lead database
• Email accounts: sold separately as an add-on. Real Google Workspace only, 24-72h setup, US IPs, managed DNS

Instantly's key assets:

• Unified sequencer with AI copilot
• Unlimited master inbox
• Built-in CRM
• 450M+ B2B lead database (50,000+ sales teams using it)
• 1,000,000+ account deliverability pool powering unlimited warmup
• Inbox placement testing monitoring 400+ blacklists with SpamAssassin
• SISR on Light Speed tier: dedicated/private server and IP block assignment

Instantly does not ship dedicated per-customer IPs below the $358/mo Light Speed tier, Microsoft 365 mailboxes, shared-IP SMTP, or Azure. Growth and Hypergrowth users are on Instantly's shared infrastructure pools, which is the point of SISR. The Light Speed tier is the answer to dedicated-IP questions inside the Instantly platform.

This is the single most important distinction between Infraforge and Instantly for any serious cold email operator.

Dedicated IPs (Infraforge) mean every outbound connection uses an IP that only you send from. Blacklist hits only affect your own sending. Gmail and Outlook build reputation signals against your specific IP over time, so consistent warm sending earns durable reputation. The downside is that you bear 100% of the reputation risk. There's no shared pool to absorb a bad sending day, and cold-start IPs need longer warmup periods than shared IPs because there's no existing traffic to 'carry' you.

Shared IPs (Instantly Growth/Hypergrowth) mean you send through Instantly's general pool alongside thousands of other customers. Reputation signals are averaged across the pool. A bad Tuesday for one neighbor affects your deliverability for 24-72 hours until rotation. The upside is that Instantly's 1,000,000+ account deliverability pool carries real weight at Gmail and Outlook. The pool has better reputation than a single new dedicated IP would have on day one. New customers benefit from that carry.

SISR (Instantly Light Speed, $358/mo) is Instantly's answer to this exact question. The Server and IP Sharding and Rotation system automatically assigns dedicated or private server/IP blocks to protect individual customers. If you're on Light Speed, your SISR allocation is Instantly's approximation of a dedicated-IP setup without actually leaving the Instantly platform.

Rough inbox placement expectations at 30 days:

• Instantly Growth (shared pool, new customer): 72-80% inbox
• Instantly Light Speed with SISR: 76-84% inbox
• Infraforge dedicated IPs (properly warmed): 75-85% inbox
• Real Google Workspace with isolated warmup and monitoring: 80-88% inbox

Dedicated IPs on Infraforge and SISR on Instantly converge around the same deliverability range because both solve the noisy-neighbor problem, just with different implementations. The difference is price structure: Infraforge is $3-4/mailbox with BYO sender, Instantly Light Speed is $358/mo software + account add-on costs.

Let's run the numbers for 30 mailboxes sending 40 emails/day, 6-month horizon.

Stack A: Infraforge + Smartlead (BYO sender)

Stack B: Instantly Growth + Google Workspace accounts

Stack C: Instantly Light Speed + accounts (SISR dedicated)

Stack B is the cheapest by a wide margin because Instantly bundles warmup and software into one line item, and the Growth tier is a genuinely competitive price point for small operators. Stack A (Infraforge + BYO) comes in second because Warmforge's standalone pricing is expensive at small volumes. Stack C (SISR dedicated via Light Speed) is the most expensive and only makes sense at much higher volume. The $358/mo ceiling is best amortized across 100+ mailboxes, not 30.

At 100 mailboxes, the math flips:

Instantly Light Speed becomes competitive at 100+ mailboxes because its $358/mo ceiling spreads out. Infraforge remains cheaper on raw mailbox costs but Warmforge's standalone pricing makes the full stack more expensive.

Pick Infraforge if:

1. 1You already pay for a sender (Smartlead, Salesforge, Saleshandy, or a custom tool) and just need dedicated-IP mailboxes.
2. 2You're sending high-volume outreach where noisy-neighbor risk on shared pools is unacceptable.
3. 3You're inside the Salesforge Forge Stack and want the bundled cross-sell (Infraforge + Warmforge + Salesforge sequencer for bundled stacking).
4. 4You want the unified Masterbox across all mailboxes in a workspace.
5. 5You need multi-IP provisioning (additional IPs beyond the default dedicated IP for security isolation).
6. 6You're building from 50+ mailboxes where dedicated IP warmup periods are amortized across enough accounts to pay back.

Infraforge is a rational pick for agencies and high-volume operators who already own their sender and want durable dedicated-IP reputation. It's the wrong pick for solo operators (no sender means you're paying for two products), small volume (the dedicated IP warmup penalty hurts more than it helps below ~25 mailboxes), or anyone who needs Google Workspace or Microsoft 365 accounts specifically.

Pick Instantly if:

1. 1You want one tool that handles sequencing, warmup, accounts, and lead generation without integrating five services.
2. 2You're fine with Google Workspace only (no Microsoft 365 coverage).
3. 3You value the 450M+ B2B lead database and AI campaign builder.
4. 4You're starting from zero and need a working sender this week.
5. 5You're sending from 10-50 mailboxes where Growth ($47/mo) or Hypergrowth ($97/mo) are competitive.
6. 6You'll eventually upgrade to Light Speed ($358/mo) when you need SISR dedicated allocations.

Instantly is the stronger pick for solo operators and early-stage teams. It's the weaker pick once you outgrow the Growth/Hypergrowth tiers and start needing Microsoft 365 coverage, real dedicated IPs without upgrading the whole sender stack, or deeper monitoring than Instantly's placement testing provides.

There's a third product category that neither Infraforge nor Instantly covers well: teams who want real Google Workspace and real Microsoft 365 and Azure mailboxes, with isolated (not shared) warmup, ongoing blacklist monitoring with auto-pause, and native integrations with senders like Instantly, Smartlead, and Saleshandy.

That's where InboxKit sits. InboxKit ships:

• Real Google Workspace mailboxes on US IPs
• Real Microsoft 365 mailboxes on US IPs at the same per-mailbox rate
• Azure mailboxes at $30/tenant for up to 100 mailboxes (the only provider in this category offering Azure, genuinely unique)
• Isolated warmup network (not a shared pool) as a $3/mailbox/month add-on, structurally different from Instantly's shared 1M+ pool
• InfraGuard monitoring bundled on all plans: 6-hour blacklist checks, DNS change detection, bounce tracking, auto-pause on listing detection
• 24+ native sequencer integrations including Instantly, Smartlead, Saleshandy, Lemlist, Apollo, Clay

Plan structure:

• Professional: $39/mo for 10 mailboxes, $3.50 extra
• Agency: $99/mo for 30 mailboxes, $3.25 extra
• Enterprise: $299/mo for 100 mailboxes, $2.99 extra

At 30 mailboxes with warmup, InboxKit Agency totals $99 + $90 warmup = $189/mo for real Google Workspace (or Microsoft 365) accounts with InfraGuard monitoring bundled. That's cheaper than the Infraforge + BYO sender + Warmforge stack ($490/mo), cheaper than the Instantly Growth + 30 Google accounts stack ($257/mo including warmup), and it ships the one capability neither competitor has: isolated warmup instead of shared-pool warmup. The tradeoff is you still need a sender, just like Infraforge, but InboxKit mailboxes plug natively into Instantly, Smartlead, and the rest, so you can use them inside any outreach platform you already pay for.