Comparison · Updated May 2026
RTB Kombucha vs GT's Synergy.
GT's Synergy is the most recognized kombucha brand in North America — the brand that mainstreamed kombucha in the 1990s. RTB is the new slow-brewed Canadian challenger with naturally low sugar (3.75g per can). Here's where each one wins.
TL;DR
Pick RTB Kombucha if you want naturally lower added sugar (3.75g per can vs 12g for GT's Trilogy), real fruit pulp, and direct-to-door freshness in Winnipeg. Pick GT's Synergy if brand recognition, 30-day-fermented Trilogy line, and the deepest flavor catalog in kombucha matter most. The price gap also tilts toward RTB — direct-to-consumer beats imported retail.
Side-by-side
| RTB Kombucha | GT's Synergy | |
|---|---|---|
| Origin | Winnipeg-based brand | Los Angeles, California (US) |
| Founded | 2026 | 1995 |
| Fermentation | 24 days (published) | 30 days (Trilogy line, published) |
| Added sugar | 3.75g per 250ml can | 12g per bottle (Trilogy, verified) |
| Ingredients | Real fruit pulp · high-altitude organic tea | Kiwi juice · raspberry juice · ginger juice · black & green tea · cane sugar |
| Format | 250ml can | 16oz / 48oz bottles |
| Price (CAD) | $4.99 per can direct | ~$5.99–$8.99 per bottle (Whole Foods) |
| Delivery | Free across Winnipeg | In-store only · grocery delivery apps |
| Availability in Canada | Direct via rtbkombucha.ca (Winnipeg) | Whole Foods · select Loblaws |
| Best for | Lower sugar, real fruit pulp, direct freshness | Brand recognition, long fermentation, wide flavor catalog |
Where RTB wins
- 3.75g added sugar per 250ml can vs GT's Trilogy's 12g per bottle — naturally lower without sweetener substitutes
- Real fruit pulp vs juice-based recipes
- Direct-to-door freshness — no continental shipping, no shelf time
- $4.99 CAD per can direct vs ~$5.99–$8.99 per GT's bottle in Canadian retail
- Free Winnipeg delivery
- Canadian brand — keeps spend local
Where GT's Synergy wins
- 30-day fermentation on Trilogy — longer than RTB's 24 days
- Brand recognition — the most recognized name in North American kombucha
- Flavor catalog — dozens of SKUs across Synergy, Trilogy, ginger, mystic mango, etc.
- Adult-version (hard kombucha) line for buyers who want alcoholic options
- Wide availability at Whole Foods in most major Canadian cities
- Founded 1995 — proven track record
Who should pick which
Pick RTB Kombucha if…
You're in Winnipeg, you'd rather not drink 12g of sugar per bottle daily, you want real fruit pulp instead of juice-based kombucha, and you prefer supporting a Canadian brand with direct-to-door delivery.
Pick GT's Synergy if…
You want the most recognized kombucha brand globally, you live outside Winnipeg with no local craft option, you have Whole Foods access, or you specifically want the 30-day-fermented Trilogy line and don't mind 12g of sugar per bottle.
Frequently asked
What's the main difference between RTB Kombucha and GT's Synergy?
RTB Kombucha is a Winnipeg-based Canadian brand with 3.75g added sugar per 250ml can, a 24-day slow ferment, real fruit pulp, and direct delivery in Winnipeg. GT's Synergy is a US brand (Los Angeles, founded 1995) — Trilogy line ferments 30 days and contains 12g sugar per bottle. The main tradeoff: naturally lower sugar + local freshness vs the longest brand history and recognition in North American kombucha.
Which has less sugar — RTB or GT's Synergy?
RTB Kombucha has 3.75g added sugar per 250ml can. GT's Synergy Trilogy contains 12g sugar per bottle (verified from GT's product page). RTB sits significantly lower than GT's Trilogy on sugar — about a third — without using stevia or other sweetener substitutes.
Which has longer fermentation — RTB or GT's?
GT's Synergy Trilogy ferments for 30 days (verified on GT's product page). RTB Kombucha ferments for 24 days. GT's Trilogy is the longer ferment on this comparison axis. Despite the shorter ferment, RTB lands lower on residual sugar (3.75g vs 12g) because the recipes use different sugar inputs and different post-ferment additions.
Is GT's Kombucha worth the price in Canada?
GT's Synergy is worth it if you value the most recognized kombucha brand globally (founded 1995, the brand that mainstreamed kombucha), the widest flavor range, and you have Whole Foods access. The tradeoff in Canada is higher per-bottle pricing (US import duty + currency conversion) and higher sugar than slow-brewed Canadian craft options like RTB.
Can I get RTB Kombucha if I don't live in Winnipeg?
Currently RTB delivers within Winnipeg only. Expansion across Manitoba and Western Canada is on the 2026 roadmap. If you're outside Winnipeg, GT's Synergy at Whole Foods or Brew Dr. at select grocers are reasonable alternatives — but expect higher sugar than RTB.
Is GT's Kombucha alcoholic?
Standard GT's Synergy contains under 0.5% ABV, classifying it as non-alcoholic in Canada. GT's also sells a separate adult-version line (hard kombucha) that IS explicitly alcoholic — it's labeled differently. RTB Kombucha is non-alcoholic (under 0.5% ABV).
naturally low sugar, slow-brewed, made for Winnipeg.
Order RTB Kombucha
Shop the three flavors →See the full 2026 Canadian Kombucha Buyer's Guide.
Disclosure & methodology. This independent comparison is published by RTB Kombucha. Data on GT's Synergy — sugar content, fermentation length, ingredients — was sourced from gtslivingfoods.com/products/gts-kombucha-trilogy as of May 2026. We use only publicly available brand names — no logos, trademarks, or proprietary imagery — for fair comparison, which is permitted under Canadian comparative-advertising standards. Numbers may change as brands reformulate; verify on each brand's label before purchase. If you represent GT's Living Foods and a fact here is incorrect, email support@rtbkombucha.ca for correction within 5 business days.