RNG vs ZM: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: RNG is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. RNG and ZM share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined RNG and ZM exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

RingCentral, Inc. (NYSE: RNG) sells cloud-based business communications, known in the industry as Unified Communications as a Service (UCaaS). Its core product bundles a business phone system, team messaging, video meetings, and, increasingly, an AI-enabled contact center (RingCX) and AI assistants like its AI Receptionist. Customers are mostly businesses that replace legacy on-premise phone hardware with RingCentral's subscription software, which is why roughly 97% of revenue is recurring subscription revenue. The company has historically grown through direct sales plus channel partnerships (including a long-running relationship with Avaya) and serves small businesses up through large enterprises.

Full RNG guide

Zoom Communications is a cloud communications company best known for its video-conferencing platform, which became a household name during the pandemic. Its core product lets people host video meetings, webinars, and calls reliably across devices, and the business sells subscriptions to individuals, small businesses, and large enterprises. Since the pandemic boom faded, Zoom has worked to evolve from a single video-meeting product into a broader unified-communications and workplace platform: Zoom Phone (cloud telephony), Zoom Contact Center, Team Chat, Zoom Rooms for hybrid offices, Zoom Docs and Whiteboard, and an expanding suite of AI features branded Zoom AI Companion. Most revenue still comes from meeting subscriptions, but management is pushing the higher-growth phone, contact-center, and AI products to re-accelerate growth and deepen enterprise relationships. Founded in 2011 and headquartered in San Jose, California, Zoom holds a large net cash position and competes against Microsoft Teams, Google, and Cisco in a crowded communications market.

Full ZM guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• RNG drivers: Margin expansion and free cash flow; AI and contact center (RingCX / RingSense).
• ZM drivers: Platform expansion beyond meetings; AI Companion and monetization.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The dominant risk is competition from Microsoft Teams Phone and Zoom Phone, which can bundle business calling into platforms enterprises already buy, pressuring both pricing and win rates. For ZM, zoom's central challenge is growth: after the pandemic surge, revenue growth slowed to low single digits as the core meetings market matured and online (small-business) churn rose.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick RNG if you believe its drivers more; ZM if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the RNG and ZM guides.

RNG. As of July 2026 the stock traded near $39 (a 52-week range of roughly $24 to $50), putting the market cap around $3.3 to $3.5 billion against about $2.51 billion of trailing revenue, so roughly 1.3 to 1.4 times sales. Reported P/E figures around 39 to 45 reflect thin GAAP earnings, while the company is more profitable on a non-GAAP and free-cash-flow basis (FY2026 non-GAAP EPS guidance of roughly $4.85 to $5.01). The valuation gap between GAAP and cash metrics is central to how investors frame the stock.

ZM. Zoom trades at a modest multiple for a profitable software company, reflecting slow top-line growth and competitive pressure from Microsoft despite high margins, strong free cash flow, and a large net cash pile. A meaningful share of the market cap is cash. Investors weigh the cheap valuation and buybacks against the risk that growth stays muted and meetings commoditize.

Headline figures (approximate, JULY 2026): RNG shows revenue (ttm) ~$2.51 billion, revenue growth (yoy, q1 2026) ~5%, fy2026 revenue guidance ~$2.62 to $2.64 billion, free cash flow (fy2026 outlook) ~$600 million; ZM shows revenue (ttm) ~$4.7 billion, revenue growth low single digits, non-gaap operating margin ~38-40%, free cash flow ~$1.5 billion annually.

RNG and ZM are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined RNG and ZM exposure against your real portfolio. It is not an investment adviser.