Instantly is the cold email infrastructure most agencies already use — warmup, deliverability, unlimited mailboxes, AI email writer — starting at $37.60/month (annual billing) for 5,000 emails and 1,500 Instantly credits. CloseFast (closefa.st) is a flat-fee prospect-discovery tool that searches Google Maps for local businesses, audits each one's actual marketing gaps — ad spend without a conversion pixel, missing SEO visibility, incomplete Google Business Profile — and generates a pitch citing the specific problem found, for €49–€99/month with no per-seat charges. The average cold email reply rate is just 0.45% across 7.5 million emails sent in 2025 (Belkins 2026), and multi-point personalization lifts reply rates by 142% — yet only 5% of senders actually personalize every email (Mailshake 2025). The gap between those two statistics is the gap between Instantly and CloseFast: one sends email well, the other finds prospects worth personalizing for.
What each tool actually does
Instantly — cold email sending infrastructure + B2B lead database
Instantly's core is cold email infrastructure: unlimited email accounts and unlimited warmup on every plan, AI email writer and reply agent on higher tiers, and the SISR (Server & IP Sharding and Rotation) system on Lightspeed and above for dedicated IP pools. It is the tool agencies reach for when they need to send volume.
Recently, Instantly added a B2B lead database — 450M+ contacts with 13 filters including keywords and lookalikes, waterfall email enrichment via 5+ providers, and AI agents that research prospects. This is accessed through Instantly Credits (1,500/month on Growth, 5,000 on Scale), which are consumed per enrichment action. The database is firmly B2B — company descriptions, headcounts, job postings, technology stacks — aimed at SaaS and mid-market outbound, not local-business prospecting.
CloseFast — prospect discovery with marketing-gap audits
CloseFast does not send email. It sits before the sending tool in the pipeline: it finds local businesses via Google Maps search, audits each one's marketing infrastructure, and generates a pitch citing the specific gap it found. The audit covers ad activity (is the business running Facebook or Google ads?), conversion tracking (does the website have a Meta Pixel or Google Ads tag?), SEO visibility (does the business rank for its own name?), and Google Business Profile completeness.
Each prospect is ranked by urgency — a business spending on ads without a pixel is a warmer lead than one doing nothing. The generated pitch is specific: "You are running Facebook ads but your website has no Meta Pixel — that means you cannot track which ad campaigns drive calls or bookings." That pitch is what you export and send through Instantly, Smartlead, or your own email tool. See our guide on how to check if a website has a Meta Pixel for the detection method behind this audit.
CloseFast costs €49/month (Starter, ~250 leads) or €99/month (Pro, ~600 leads), flat, with no per-seat charges and no consumable credits. A free tier gives 10 leads per month with full audit capability. Pricing is on the closefa.st homepage.
Pricing comparison
| Instantly | CloseFast (closefa.st) | |
|---|---|---|
| Pricing model | Tiered by email volume + Instantly credits | Flat monthly fee, no credits, no per-seat |
| Entry price | $37.60/mo (annual) / $47/mo (monthly) — Growth | €49/mo (~$53) — Starter |
| Mid tier | $77.60/mo (annual) — Hypergrowth, 100K emails | €99/mo (~$107) — Pro, ~600 leads |
| High tier | $286.30/mo (annual) / $358/mo (monthly) — Lightspeed | N/A (Pro is top tier) |
| Agency tier | $555/mo — white-label, client management | N/A |
| Lead discovery | 450M+ B2B database, credit-based enrichment | Google Maps local search (included) |
| Lead type | B2B contacts (name, title, company, email) | Local businesses with marketing audit |
| Email sending | Yes — warmup, rotation, deliverability, AI writer | No — generates pitches, you send them |
| Personalization | AI writer using LLMs + enrichment data | Marketing-gap citations (ad spend, pixel, SEO) |
| Free tier | None (signup required) | €0/mo, 10 leads with full audits |
| Verified | August 2026 at instantly.ai/pricing | August 2026 at closefa.st |
A solo agency owner on Instantly Growth pays $37.60/month (annual) for 5,000 emails and 1,500 enrichment credits. The same operator on CloseFast Starter pays €49/month (~$53) for ~250 prospects with full audits and generated pitches. The tools are not substitutable 1:1 — Instantly's price buys email infrastructure, CloseFast's buys prospect discovery. Most agencies need both, and the best cold email tools roundup covers how Instantly compares to Smartlead, Lemlist, and others on the sending side.
The lead-discovery gap: B2B contacts vs local-business audits
Instantly's 450M+ B2B lead database is a genuine addition — it answers the "where do I get leads" question that previously required a separate tool like Apollo or Seamless.AI. The database has 13 filters (keywords, lookalikes, company size, industry), waterfall enrichment across 5+ email providers, and AI agents that research each prospect. For B2B outbound targeting SaaS companies, mid-market tech, or enterprise sales, this is a real capability.
But the database does not tell you whether a local business is spending on Facebook ads without a conversion pixel. It does not tell you whether a dentist ranks for their own practice name. It does not audit a plumber's Google Business Profile for missing photos or categories. These are the qualification signals that make a local-business owner reply to cold outreach — and they require a fundamentally different data source (Google Maps, ad libraries, live website inspection) than a B2B contact database.
Multi-point personalization improves cold email reply rates by 142% — but only 5% of senders actually personalize every email (Woodpecker and Mailshake studies, 2025, cited via FullSend reply-rate benchmarks). The personalization that moves reply rates is not inserting a first name — it is citing a specific, verifiable problem the prospect has.
CloseFast's audits provide that problem. "You are running Facebook ads but your website has no Meta Pixel" is a personalization point that no B2B contact database can generate — it requires checking the prospect's live website against the Meta Ad Library, which is exactly what CloseFast does.
When Instantly is the better choice
Instantly is the better choice when you already have leads — or when your target market is B2B. If you are prospecting SaaS companies, mid-market tech firms, or enterprise decision-makers, Instantly's 450M+ contact database with firmographic filters is genuinely useful, and its sending infrastructure (warmup, IP rotation, AI reply agent) is among the best available. A B2B agency running 50,000 emails/month to VP-level contacts at tech companies should use Instantly, not CloseFast.
Instantly is also the better choice if your bottleneck is deliverability, not lead quality. If your emails are landing in spam, switching to Instantly's warmup and SISR system will do more for your reply rates than any prospect-discovery tool. The Lemlist vs CloseFast comparison covers a similar split — Lemlist sends better, CloseFast finds warmer — and the same logic applies here with Instantly in the sending role.
When CloseFast is the better choice
CloseFast is the better choice when your agency targets local businesses — dentists, plumbers, restaurants, law firms, salons — and your current bottleneck is finding qualified prospects, not email deliverability. If you are spending hours scrolling Google Maps, checking whether businesses run ads, or manually inspecting websites for pixels, CloseFast automates that entire workflow and generates the pitch.
CloseFast is also better when you need personalization that goes beyond first-name insertion. The qualification checklist we published covers the signals — ad spend without tracking, poor SEO, incomplete Google Business Profile — and CloseFast audits all of them automatically per prospect.
Companies with 0–10 employees reply to cold email at 0.72% — nearly triple the enterprise rate of 0.22% (Belkins 2026, across 7.5M emails). Small businesses are more responsive, but only when the message is specific enough to feel hand-written. CloseFast's marketing-gap citations are what makes that possible at scale.
Bottom line
Instantly and CloseFast are different layers of the same pipeline. Instantly sends email at scale with excellent deliverability; CloseFast finds local-business prospects with marketing-gap audits and generates pitches. Agencies that target local businesses should use both — CloseFast to find and qualify, Instantly to send. Agencies that target B2B can use Instantly alone for both contact-finding and sending, but will not get the local-business marketing audits CloseFast provides. For the full local-prospecting framework CloseFast automates, see how to find local business clients for your agency.
Read next
- Best Cold Email Tools for Agencies (2026) — how Instantly compares to Smartlead, Lemlist, and 7 other sending tools
- How to Find Local Business Clients for Your Agency — the full local-prospecting framework CloseFast automates
- Lemlist vs CloseFast: Agency Prospecting Compared — the same sending-vs-discovery comparison against Lemlist