RDDT vs. GOOGL: Which Ad-Tech Powerhouse Stock Has Greater Upside?

The rapidly expanding global digital advertising market presents growth opportunities for both Reddit (RDDT) and Alphabet (GOOGL), though RDDT is highlighted for greater upside potential. Reddit's Q2 2025 advertising revenue surged 84% year-over-year to $465 million, driven by a 50% increase in active advertisers and enhanced engagement tools, positioning it as a Zacks #1 Strong Buy. Conversely, Alphabet's Q2 ad revenue grew 10.4% to $71.34 billion, with strong Search and YouTube performance offset by a 1.2% decline in its Network ad business, leading to a Zacks #3 Hold rating. While both stocks are considered overvalued, RDDT's aggressive growth trajectory and expanding user base are seen as key differentiators against GOOGL's established dominance and competitive pressures.

Analysis

The digital advertising market, projected to grow at a 15.4% CAGR through 2030, provides a significant tailwind for both Reddit (RDDT) and Alphabet (GOOGL), though they represent distinct investment profiles. Reddit is demonstrating hyper-growth characteristics, evidenced by an 84% year-over-year increase in Q2 2025 advertising revenue to $465 million, driven by a 50% expansion in its active advertiser base. This operational momentum is supported by product innovation, such as the rapid user adoption of Reddit Answers, which grew from 1 million to 6 million weekly users in the quarter. In contrast, Alphabet's growth is more mature, with its Q2 2025 advertising revenue rising a solid but comparatively modest 10.4% to $71.34 billion. While its core Search (+11.7%) and YouTube (+13.1%) segments remain robust, its Google Network business shows signs of weakness with a 1.2% year-over-year revenue decline. Although both companies are flagged as overvalued, RDDT trades at a steep forward P/S multiple of 17.35x versus GOOGL's 7.76x, a premium reflecting its far superior projected 2025 earnings growth of 154.35% compared to GOOGL's 24.38%. This divergence in growth trajectory and outlook is encapsulated by their respective Zacks Ranks: #1 (Strong Buy) for RDDT and #3 (Hold) for GOOGL.

Key Decisions for Investors

• Investors with a higher risk tolerance seeking exposure to hyper-growth in the ad-tech space should consider RDDT, given its 84% ad revenue growth, expanding advertiser base, and strong earnings outlook, despite its premium valuation.
• For investors in GOOGL, it is critical to monitor the performance of the Google Network segment, as its 1.2% year-over-year decline signals a potential drag on overall growth that contrasts with the strength in Search and YouTube.
• A relative value or pairs trade strategy could involve a long position in RDDT to capitalize on its disruptive growth momentum, while maintaining a neutral or underweight position in GOOGL, reflecting its mature market position and identified headwinds.
• Before initiating or adding to positions, investors should weigh RDDT's high forward Price/Sales multiple of 17.35x against its aggressive growth, acknowledging that the market has already priced in significant future success.