Who is King Kong?
King Kong is a digital marketing agency founded by Sabri Suby, who says on the agency's site that he started it from his bedroom. It began in Australia and now lists a Santa Monica, California address alongside offices in Melbourne and Los Angeles, per kingkong.co.
It's one of the most recognized agency brands in Australia. And the press backs that up:
- B&T reported in March 2020 that King Kong ranked 17th on the AFR Fast Starters list, its third appearance, with revenue over $12.5M, up 90%.
- Forbes Australia reported in June 2023 that revenue was above $25M a year.
- Its site claims $10.2 billion in reported client revenue and shows a 2,000+ clients badge. Those are King Kong's own figures.
Founding year varies by source. Its site says 13 years in business, and Forbes Australia says it launched in 2014.
So this isn't a page about whether King Kong is good at what it does. It's about which MODEL fits your business.
What King Kong sells
King Kong sells done-for-you digital marketing: SEO, conversion rate optimization, Google Ads, Facebook Ads, landing pages and web design, per its website.
It also sells education. Its Quantum Growth courses and Sabri's book Sell Like Crazy sit alongside the agency service.
Who it serves is broad. The B&T coverage names clients across homebuilding, legal, fitness and real estate. So King Kong is a full-service growth agency, not a B2B specialist.
That's the first real difference with insaneX. One sells a wide menu of channels. The other builds one thing: a B2B booking machine that puts qualified sales calls on your calendar.
King Kong pricing and guarantee
King Kong's fees start at $4,000 a month plus your ad spend, which you pay directly to Google or Meta, with a six-month minimum term, per its website as of November 2026.
| Item | Figure | Source |
|---|---|---|
| Agency fee | From $4,000 a month | kingkong.co |
| Ad spend | Extra, paid to Google or Meta | kingkong.co |
| Minimum term | Six months | kingkong.co |
| Guarantee | "Beat your results by 30% or we work for free" | kingkong.co |
The minimum commitment in fees alone: 6 x $4,000 = $24,000, before a dollar of ad spend.
The guarantee is worth reading closely. The site's FAQ frames it for businesses already running ads: a 30% ROAS increase or a 30% lower acquisition cost. We didn't find the full terms and exclusions published, so ask for them in writing.
Published pricing and a stated guarantee. Most agencies give you neither.
King Kong agency reviews: what clients say
King Kong holds 3.9 out of 5 on Trustpilot from 349 reviews, as fetched in November 2026. The spread is polarized: 78% five-star and 16% one-star.
| Platform | Rating | Note |
|---|---|---|
| Trustpilot | 3.9 (349 reviews) | 78% five-star, 16% one-star |
| Clutch | 1.0 (1 review) | Unclaimed profile, one verified review of a 2018 to 2020 Google Ads project |
| kingkong.co/reviews | 7,616+ reviews claimed | Hosted on its own site, labelled "Verified Review" |
| G2 | Not found | No profile located |
What reviewers praise. On Trustpilot, people describe helpful, low-pressure strategy calls, long-term SEO results over several years, and value from the Quantum Growth program and its weekly Q&A.
What reviewers flag. Other Trustpilot reviewers report poor ad results for the money spent, unexpected charges after a $2.99 book offer, work they say wasn't delivered, and Meta campaigns run through the agency's own ad account, which limited their access to the data.
What Clutch shows. One review, from the founder of an addiction recovery business, covering a Google Ads project from July 2018 to July 2020. They say the agency generated leads but none were qualified, that communication slowed over time, and they would not recommend it. They also praised the founder's marketing knowledge. One review is one review. But the complaint is worth noting: leads that never qualified.
What its own site shows. King Kong's reviews page says it has 7,616 reviews, with client stories such as revenue up 35 to 40% and a 49% increase in leads after 18 months. Those are its own selected reviews. Useful for what's possible, not for what's typical.
Trustpilot also flags that King Kong hasn't replied to negative reviews and hasn't recently invited customers to review, so the sample may not be representative. Only 17 of the 349 reviews landed in the last 12 months.
Fair summary? A big agency with many happy clients and a real cluster of unhappy ones. That pattern usually signals fit. Read the 1-star and 5-star reviews for businesses that look like yours.
How to read King Kong reviews (and any agency's)
Read agency reviews by source: independent platforms show the range, the agency's own page shows the best case, and the reviews from businesses like yours matter most.
| Source | Who picks the reviews | What it's good for |
|---|---|---|
| Trustpilot | Anyone, invited or not | The spread, including the angry tail |
| Clutch | Verified clients, interviewed | Project detail: scope, dates, what went wrong |
| The agency's own site | The agency | Best-case outcomes and the industries it serves |
Then filter hard. Ignore reviews about the course if you're buying the agency. Ignore a home builder's result if you sell software.
And look for patterns, not stories. On Trustpilot, the same complaints repeat across King Kong's one-star reviews: results versus spend, cancellation and refunds, and access to ad data. One reviewer says they were told no refund was possible. That's a reviewer's account, not a verified fact. But it tells you which contract clauses to read before you sign.
The same filter applies to us. insaneX reports an 87% client success rate, and most new clients come from referrals. Ask any agency, us included, what counts as success and how it's measured.
Who King Kong suits best
King Kong suits established businesses that want a full-service agency across SEO, paid ads and conversion, and can commit $24,000+ in fees over six months.
- Great fit: a business already running profitable Google or Facebook ads that wants to qualify for the 30% guarantee.
- Good fit: brands that need SEO and paid media under one roof, B2C or B2B.
- Good fit: owners who want to learn the system themselves through Quantum Growth.
- Weaker fit: B2B companies whose real need is booked, qualified sales calls rather than traffic and leads.
Leads aren't calls. Calls aren't customers. If your problem is an empty sales calendar, buy a system that measures the calendar.
King Kong vs insaneX: full-service agency vs B2B booking machine
Both use paid ads. King Kong runs a broad growth program across channels. insaneX builds one B2B system that ends on a held, qualified sales call.
| King Kong | insaneX | |
|---|---|---|
| Focus | Full-service: SEO, CRO, Google, Facebook, web | B2B and SaaS booked sales calls |
| Ads | Google and Facebook | Meta and Google, to a cold traffic offer |
| Funnel | Landing pages and web design | 7-question quiz funnel (about 30 seconds) with the calendar inside |
| Follow-up | Not detailed on its pricing copy | CRM, email and SMS follow-up plus a VSL |
| What gets reported | ROAS and acquisition cost (per its guarantee) | Held and qualified calls, reported separately |
| Speed | Not published | Built and live in 14 days |
| Published price | From $4,000 a month plus ad spend, 6-month minimum | Not listed on this page |
| Who's turned away | Not stated | Pre-revenue businesses |
| Track record | $10.2B reported client revenue (its claim) | $54.3M+ client revenue, 85+ SaaS and B2B brands, 9x average ROAS |
King Kong is the bigger agency by a mile. insaneX is narrower on purpose.
A B2B buyer doesn't buy from an ad. They buy on a call. So every part of the insaneX build points at the calendar: the quiz qualifies, the calendar sits inside it, and the follow-up gets them to show.
See how it fits together in the funnel teardowns.
Questions to ask King Kong (or any agency) before you sign
Ask five questions before you sign a six-month agency contract. The Trustpilot complaints above tell you exactly which ones.
- "Can I see the guarantee terms in writing?" What counts as a 30% improvement, measured against which baseline, over which months, and what "work for free" covers.
- "Whose ad account do the campaigns run in?" Yours, always. If you leave, the data, pixels and history should leave with you.
- "What do you report every week?" Clicks and leads are cheap to report. Ask for cost per held sales call and cost per customer.
- "What happens after month six?" Notice period, renewal terms, and what you keep: landing pages, copy, creative, CRM setup.
- "Which clients like me have you worked with?" A home builder's results tell a SaaS founder almost nothing. Ask for your industry and deal size.
These aren't trick questions. A good agency answers all five in one email.
More red flags in the free guide to vetting a provider.
King Kong alternatives
The right King Kong alternative depends on what you need: another full-service agency, a B2B paid specialist, an outbound appointment setter, or a B2B booking system like insaneX.
- SaaS Hero. A B2B and SaaS paid media agency with a public rate card of $4,500 a month, or $6,000 with creative, on a 3-month term, per its pricing page (November 2026). Clutch 5.0 from 11.
- Directive. B2B paid media, content and RevOps focused on qualified pipeline, per its site. Clutch 4.8 from 56.
- Belkins. If you'd rather go outbound: cold email and LinkedIn, with a pay-per-appointment plan from $750 per meeting plus a $1,500 setup fee, per its own page. See Belkins alternatives.
- insaneX. Ads, quiz funnel, CRM and follow-up built around 5-7 qualified sales calls a day, live in 14 days. 87% client success rate, most new clients from referrals.
More options by model in best B2B lead generation agencies.
Questions
Is King Kong a legit agency?
Yes. King Kong is a real, established agency founded by Sabri Suby, ranked 17th on the AFR Fast Starters list in 2020 per B&T, with revenue reported above $25M a year by Forbes Australia in 2023. Its Trustpilot rating is 3.9 from 349 reviews as of November 2026.
How much does King Kong charge?
King Kong's website says its fees start at $4,000 a month plus ad spend, which you pay directly to Google or Meta, with a six-month minimum term. That makes the minimum fee commitment $24,000 before ad spend.
What are King Kong agency reviews like?
Polarized. Trustpilot shows 3.9 from 349 reviews, with 78% five-star and 16% one-star. Positive reviews praise strategy calls, SEO results and the Quantum Growth program. Negative reviews cite ad results, unexpected charges and access to campaign data.
Can you cancel a King Kong contract early?
Its website lists a six-month minimum term. Some Trustpilot reviewers describe disputes over cancelling and refunds, which are their accounts, not verified facts. Ask for the cancellation, refund and notice terms in writing before you sign.
Is King Kong worth it?
It can be for an established business that wants SEO and paid media under one roof and can commit $24,000+ in fees over six months. If your real need is qualified B2B sales calls on a calendar, a specialist built around that number is usually a better fit.
What is the King Kong guarantee?
King Kong's site says it guarantees to beat your results by 30% or work for free. Its FAQ frames this for businesses already running ads, as a 30% ROAS increase or 30% lower acquisition cost. We did not find the full terms published, so request them in writing.
What are the best King Kong alternatives?
For B2B paid media: SaaS Hero (from $4,500 a month) or Directive. For outbound meetings: Belkins (from $750 per appointment). For B2B booked sales calls: insaneX, which builds ads, a 7-question quiz funnel with the calendar inside, and follow-up in 14 days.
How is insaneX different from King Kong?
King Kong is a full-service agency across SEO, CRO, Google and Facebook ads for many industries. insaneX builds one B2B system: Meta and Google ads to a qualifying quiz with the calendar inside, CRM and email and SMS follow-up, with held and qualified calls reported separately.